Personal Hygiene and Bacteria

 Learn more: THE EXERCISE

Important note before you read: This article explores personal hygiene and the human microbiome as lifestyle and wellbeing topics. It is not medical advice. If you have a skin, dental, gynecological, or urological concern — or if you are considering antibiotics — consult a doctor.

You are not alone. Not even in your own body.

You are living with trillions of microorganisms — more than your own human cells by ten to one. You are, by cell count, more bacterial than human.

These microbes are not invaders. They are partners. They help you digest food, produce vitamins, regulate your immune system, influence your mood, and protect you from harmful pathogens.

And your personal hygiene — the daily practices of washing, brushing, and caring for your body — determines whether this inner ecosystem thrives or collapses.

This article explores both sides: who lives inside you, and how to care for the body that houses them.

Part One: The Bacteria Within

What Bacteria Are

Bacteria are unicellular microorganisms with cell walls but no organized nucleus.

They are microscopic — about 1,000 times smaller than a pencil tip. They are extraordinarily diverse, appearing in different species, shapes, and forms. They are so powerful and complex that they can survive in extreme conditions.

Most of the world's biomass is covered by microbes. In a gram of soil, there are approximately 40 million bacterial cells. In a milliliter of fresh water, there are a million bacterial cells. Bacteria can be found everywhere, including the world's most hostile environments.

Your body is a virtual zoo of bacteria. Everyone has a unique cloud of millions of bacteria, viruses, and fungi living on and inside them — outnumbering their own cells ten to one.

Bacteria are natural decomposers, breaking down dead material and recycling it. They reproduce through binary fission, in which one cell splits into two identical cells. Some species can split in just 20 minutes, given the right environment.

The Role of Bacteria in Your Life

Your body moves forward only with the cooperation and collaboration of bacteria.

The bacteria in your body help degrade the food you eat, make nutrients available to you, and neutralize toxins. Your microbiota is a defensive mechanism — it protects you against infections by defending against invading pathogens.

The thousands of species and trillions of inhabitants living in all parts of your body make up your microbiome. This microbiome:

• Supports and maintains your health
• Protects you against germs
• Breaks down food to release energy.
• Supports digestion.
• Regulates your mood. 
• Produces vitamins

When the microbiome is disturbed, it is associated with hundreds of ailments — including autoimmune conditions, cardiovascular disease, and certain cancers.

Changes in the microbiome occur throughout your life — influenced by the food you eat, the environment you live in, the people and animals you interact with, and the medicines you take.

How You Acquired Your Microbiome

You have been colonized by bacteria since birth.

Babies receive microorganisms from their mothers during delivery. A newborn gets more bacteria from the mother through breastfeeding. As babies grow, their microbiome expands through food and childhood habits like licking objects and crawling.

Over time, you accumulate bacteria from many sources. Most of the microbes inside you are not harmful — they help you maintain your metabolism. The good microbes inside you can fight against the bad ones trying to enter your body and cause disease.

The microbes that cause disease are called pathogens, and the sickness they cause is called an infection.

The Microbes You Carry Everywhere

Bacteria are with you 24/7.

In your mouth: Every five hours, approximately 20 billion bacteria in your mouth are reproduced. If you skip brushing, they can number 100 billion within 24 hours. When too many bacteria accumulate in your mouth, they stick to the surface of your teeth. When some convert food into acid, it causes tooth or gum infection. This is why you need to brush your teeth at least twice a day for two to three minutes.

In your armpits: Contrary to popular opinion, it is not sweat that makes your armpits smell — it is the bacteria living there producing smelly compounds when they encounter sweat.

In your gut: There are approximately 1,000 bacterial species colonized in the human gut. The dominant genera include Bacteroides, Clostridium, Fusobacterium, Eubacterium, Ruminococcus, Peptococcus, Peptostreptococcus, and Bifidobacterium. Different levels of diversity in gut bacteria are associated with obesity, diabetes, asthma, and intestinal diseases.

On your skin: A total of 42 unique kinds of bacteria are found inhabiting the skin of the penis. Vaginal lactobacillus species — over 20 identified — are important for urogenital health.

On your hands and nails: Bacteria stay under fingernails and can cause infection. Keep your nails trimmed and clean.

Between people: A ten-second kiss can spread 80 million bacteria between mouths. Bacteria can also be transmitted through sexual contact. There is nothing to worry about as long as you maintain healthy habits — a healthy diet, regular exercise, personal hygiene, proper hydration, and safe sex practices.

The Gut-Brain Axis: How Bacteria Influence Your Mind

Your gut bacteria do not just affect your digestion — they affect your mind.

The gut and the brain are connected through a complex network of nerves, hormones, and chemical signals known as the gut-brain axis. The vagus nerve — the longest cranial nerve in the body — runs directly from your gut to your brain, carrying signals in both directions.

Your gut bacteria produce neurotransmitters, including serotonin, dopamine, and GABA, which influence mood, anxiety, and cognition. Approximately ninety percent of your body's serotonin is produced in your gut, not your brain.

This is why the state of your microbiome has such a profound impact on your mental health. Depression, anxiety, brain fog, and mood swings are often linked to gut imbalances.

When you heal your gut, you support your mind. When you nourish your microbiome, you nourish your mental and emotional well-being.

The Antibiotics Can Be Both Life-Saving and Destructive

Antibiotics are one of the greatest medical advances in human history. They have saved millions of lives by killing the bacteria that cause dangerous infections.

But they come with a cost that is often overlooked. Antibiotics do not discriminate — they kill both harmful and beneficial bacteria. A single course can wipe out large portions of your microbiome, leaving you vulnerable to infections, digestive issues, and long-term health problems. In some cases, it takes months or years for the microbiome to recover — and it may never fully return to its original state.

This is why antibiotics should be used only when genuinely necessary. They cannot treat viral infections — taking them for a cold or flu does nothing and contributes to the growing problem of antibiotic resistance.

When antibiotics are needed, they should be accompanied by probiotic-rich foods and supplements to support the restoration of your microbiome.

Always follow your doctor's guidance on antibiotic use. Do not self-prescribe, and do not pressure your doctor into prescribing antibiotics when they say they are not needed.

How to Build a Healthy Microbiome

Step 1: Diversity. A diverse microbiome is a resilient microbiome. Eat a wide variety of plant-based foods — different fibers feed different bacteria. Aim for thirty different plants per week.

Step 2: Fermented foods. Yogurt, kefir, kimchi, sauerkraut, miso, and tempeh are rich in probiotics that replenish beneficial bacteria.

Step 3: Prebiotics. These are fibers that feed your existing bacteria — found in garlic, onions, leeks, asparagus, bananas, and oats.

Step 4: Avoid unnecessary antibiotics, processed foods, and environmental toxins.

Step 5: Manage stress. Chronic stress alters the composition of your gut bacteria. Meditation, yoga, and time in nature support a healthy microbiome.

Step 6: Sleep. Your bacteria follow circadian rhythms, just as you do. Prioritize rest.

Step 7: Move. Exercise increases microbial diversity.

Your microbiome is not fixed — it responds to your choices. Make choices that support it, and it will support you.

Your Microbiome Affects Your Weight

Your weight is not just determined by how much you eat and how much you exercise. It is also influenced by your microbiome.

Research has shown that the composition of gut bacteria differs between lean and obese individuals. Certain bacteria are more efficient at extracting calories from food. Other bacteria produce compounds that influence hunger, fullness, and fat storage.

The good news is that your microbiome can be changed. By eating a diet rich in fiber, plants, and fermented foods, you can shift your microbiome toward a healthier composition. Over time, this supports better metabolism, reduced cravings, and a healthier weight.

You Are More Bacterial Than Human

For every one human cell in your body, there are approximately ten bacterial cells. By cell count, you are only about ten percent human.

By genetic material, the numbers are even more striking — the bacteria in your body contain roughly 150 times more genes than your own DNA. The vast majority of the genetic information operating within your body is not yours.

These microbes are not passengers. They are partners in every function of your body. They help you digest food, produce vitamins, regulate your immune system, influence your mood, and even shape your behavior.

You are not an individual — you are an ecosystem.

And like any ecosystem, your health depends on the balance and diversity of its inhabitants. When the balance is disrupted, disease follows. When the balance is restored, health returns.

Part Two: Your Personal Hygiene

What Personal Hygiene Is

Your personal hygiene is essential — it influences you throughout your life.

Poor hygiene affects your mood, your interactions with others, and the way you feel about yourself. Good hygiene boosts your confidence and self-esteem and makes you seem more positive and attractive to others. Good personal hygiene habits provide you with better health, protecting you from hygiene-related illness.

Poor personal hygiene leads to body odour and greasy skin. Practicing good body hygiene helps you feel good about yourself — important for your mental health as well.

Personal hygiene is the combination of both your physical and mental hygiene habits. When you keep up both, you become more spiritually connected as well.

When you are inside a body, you are responsible for its upkeep as long as you stay inside. The body starts to control your spirit by default until you make it the other way around.

The Physical Hygiene Practices

Step 1: Wash your body well. Washing your hands and brushing and flossing your teeth helps keep bacteria, viruses, and illness at bay.

Your disheveled hair and clothes, body odor, bad breath, and missing teeth are not healthy — and sometimes you have to face discrimination when you are not hygienic.

Your body is constantly shedding skin. If not regularly washed, this can cause illness.

Wash your hands before preparing or eating food, after using the bathroom, after coughing or sneezing, or after handling garbage. This is so simple and so effective — it protects you from the spread of bacteria and viruses.

Every day, you come into contact with millions of germs and viruses from outside. Poor hygiene can jeopardize your life.

Step 2: How to wash your body. Wet your skin before applying soap. Apply bar soap or body wash. Start from your neck and shoulders and work your way down. Do not forget your legs and between your toes. Wash from top to bottom so the soap rinses off your skin.

Focus on the parts that need it most — under your arms, chest, genital area, and feet. Wash skin folds and between your toes.

Be extra gentle when you exfoliate your face and neck — the skin is more sensitive there.

Areas people often miss:

• Belly button — collects lint and dirt, an ideal breeding ground for bacteria. Clean with a cotton swab.
•  Behind the ears — sebaceous glands secrete sebum that can become smelly if not cleaned.
• Tongue — bacteria accumulate between taste buds. Use your toothbrush to brush it.
• Between the toes — "toe jam" is the debris that builds up there. Wash and dry thoroughly.
• Your back and buttocks — neglected areas where pores can get clogged, leading to back and butt acne.

Brush your teeth at least twice a day and floss daily. This protects you from gum disease and tooth decay.

Step 3: Genital hygiene. Keep your undergarments dry. Do not stay in wet clothes for long — this may lead to yeast infections. Change sanitary pads every 4-6 hours. Wash the genital area after intercourse. For both men and women: use warm water. Avoid harsh soaps and scented feminine hygiene products. For men, poor hygiene can allow smegma to form under the foreskin, causing inflammation. For women, avoid douching. Always practice safe sex.

Step 4: Trim your nails. Keep fingernails and toenails trimmed to protect from hangnails and infected nail beds.

Mental Hygiene: The Other Half

Mental hygiene is your level of psychological well-being. It is the state of mind when you are functioning at a satisfactory level of emotional and behavioral adjustment.

Mental hygiene is the practice of maintaining mental health and preventing the development of psychological disorders. The way you feel, think, or act reflects your mental health. It also determines how you handle stress, relate to others, and make choices.

Mental health is important at every stage of life. If you don't have mental hygiene, you can't keep up your physical hygiene either — they are deeply linked.

How to maintain mental hygiene:

•  Talk about your feelings. You are a social being — do not bury your problems deep inside. Share with friends, relatives, or partners.
• Follow a healthy diet. Avoid excessive processed food.
•  Drink sensibly. Never wait until thirst — it is the last signal.
• Practice breathing exercises and proper hydration.
•  Avoid excessive drugs, nicotine, caffeine, alcohol, and smoking.
• Meditate. Start your day with a mental cleaning process.
• Follow your passion. When your life is built around passion, you are less likely to be stressed.
•  Practice time management. Find time to relax.
•  Watch films, enjoy music, and spend time with loved ones.
• Get good sleep.

 Your Skin Is Your First Line of Defense

Your skin is not just a covering — it is your body's largest organ and first line of defense against the outside world.

It protects you from bacteria, viruses, and environmental toxins. It regulates your body temperature. It produces vitamin D when exposed to sunlight. It senses touch, heat, cold, and pain. And it is constantly renewing itself, shedding millions of skin cells every day.

When you neglect your skin, you compromise all these functions. Poor hygiene leads to clogged pores, acne, infections, and odor. It allows bacteria to multiply on your skin's surface and enter through cracks or wounds. It creates the conditions for fungal infections, rashes, and irritation.

When you care for your skin — when you wash it regularly, moisturize it, protect it from the sun, and keep it clean — you support your body's natural defenses.

Your skin is not just about appearance. It is about health.

Oral Hygiene Is More Important Than You Think

Your mouth is not just for eating and speaking — it is a gateway to your entire body.

The bacteria in your mouth do not stay in your mouth. They can travel through your bloodstream and affect your heart, your brain, and your immune system. Research has linked poor oral hygiene to cardiovascular disease, diabetes, respiratory infections, and even cognitive decline.

This is why brushing your teeth and flossing is not just about having fresh breath or a bright smile — it is about protecting your entire body.

Brush twice a day. Floss daily. Brush your tongue. Visit your dentist regularly. Your mouth is the gateway to your health. Guard it well.

The Hidden Dangers of Neglecting Your Feet

Feet are one of the most neglected parts of the body — and yet they carry you through every moment of your life.

When you neglect your feet, you create the conditions for a range of problems:

•  Athlete's foot — a fungal infection that thrives in warm, moist environments.
• Toe jam — a buildup of debris, sweat, and bacteria between the toes.
• Ingrown toenails — caused by improper trimming.
•  Blisters — caused by friction and moisture.
•  Cracked heels — caused by dryness and pressure.
• Fungal nail infections — which can be difficult to treat.

These problems are not just cosmetic — they can be painful, persistent, and can lead to more serious infections.

Wash your feet daily, especially between the toes. Dry them thoroughly. Trim your nails straight across. Wear clean, breathable socks. Rotate your shoes. Take care of the foundation of your body.

Your Clothes and Bedding Harbor Bacteria

What you wear and what you sleep on can either support your hygiene or undermine it.

Your clothes absorb sweat, oils, and dead skin cells throughout the day. If you do not wash them regularly, they become a breeding ground for bacteria and fungi. This is why body odor is often more about your clothes than your body.

The same applies to your bedding. You spend roughly one-third of your life in bed. Every night, you shed skin cells, sweat, and oils. If you do not wash your sheets regularly, they accumulate bacteria, dust mites, and allergens.

A good rule: wash your clothes after every wear or two, and wash your bedding at least once a week.

Clean sheets, clean clothes, clean body — these are the foundations of good hygiene.

Mental Hygiene Is as Important as Physical Hygiene

Most people think of hygiene as physical — washing your body, brushing your teeth, keeping your clothes clean.

But there is another dimension equally important: mental hygiene.

Your mind, like your body, accumulates toxins. It collects stress, worry, resentment, fear, and negativity. If you do not cleanse these on a regular basis, they build up and cause dysfunction.

Mental hygiene is the practice of clearing your mind of these toxins. It is the practice of talking about your feelings, processing your emotions, meditating, journaling, and taking time to rest. It is the practice of setting boundaries, removing yourself from toxic environments, and surrounding yourself with positive influences.

Physical hygiene protects your body from disease. Mental hygiene protects your mind from dysfunction. The two are deeply connected.

A mind that is clean supports a body that is clean. A body that is clean supports a mind that is clear. Care for both, and you will experience the health and vitality you deserve.

How to Care for Your Microbiome Through Hygiene

Your hygiene practices can either support or disrupt your microbiome. Here is how to support it.

Use gentle, unscented soap. Harsh soaps and antibacterial products kill beneficial bacteria along with harmful ones. Regular, mild soap and water are enough for most of the body.

Do not over-scrub. Excessive scrubbing and exfoliation damage the skin barrier that houses your microbiome.

Avoid antibacterial everything. Unless you are in a medical setting, antibacterial soaps and sanitizers are not necessary. Regular soap is enough.

Brush gently. Rough brushing damages your gums and can allow harmful bacteria to enter your bloodstream.

Wash your hands with soap and water — not antibacterial gel — whenever possible.

Support your gut with diet. Your gut microbiome is the largest community in your body. Feed it with fiber, fermented foods, and prebiotics.

Your hygiene and your microbiome are not enemies. They are partners — when you practice hygiene consciously, you support the ecosystem that keeps you alive.

Your Microbiome Is Passed Down From Your Mother

Your microbiome begins forming before you are born.

During delivery, you are exposed to your mother's vaginal and intestinal bacteria — the first microbes to colonize your body. Babies born by cesarean section are exposed to a different set of bacteria — typically those from the skin and the hospital environment — which can affect their health later in life.

Breastfeeding continues the transfer of beneficial bacteria and prebiotics.

As you grow, your microbiome continues to evolve, influenced by food, environment, people, animals, and medicines. By the age of three, your microbiome is largely established.

But it is not fixed — it continues to shift throughout your life.

The health of your microbiome is not just your own — it is a legacy you pass on to your children.

The Future of Hygiene and Health Is Holistic

The future of health is not just about drugs and surgery. It is not just about soap and sanitizer. It is about the recognition that you are a complex, interconnected ecosystem.

Hygiene and microbiome are not separate concerns. They are one integrated system. The body, the mind, and the trillions of microbes living within you are not independent — they are a community.

When you care for your hygiene consciously, you support the microbiome. When you nourish your microbiome, you support your health. When you honor both, you thrive.

What You Can Do

To support your microbiome:

• Eat a diverse range of plant foods — aim for 30 different plants per week.
• Include fermented foods — yogurt, kefir, kimchi, sauerkraut, miso.
• Add prebiotic fibers — garlic, onions, leeks, asparagus, bananas, oats.
• Avoid unnecessary antibiotics — take them only when medically needed.
• Manage stress through meditation, yoga, and time in nature. 
• Prioritize sleep.
• Exercise regularly.

To maintain personal hygiene:

• Shower regularly — use mild soap, focus on armpits, genital area, feet, and skin folds.
• Brush your teeth twice a day and floss daily.
• Wash your hands frequently — before eating, after using the bathroom.
• Trim your nails.
• Clean often-missed areas — belly button, behind the ears, between toes.
• Wash your clothes and bedding regularly.
• Practice safe sex.
• Care for your feet — wash, dry, and trim
• Support your mental hygiene — talk about feelings, meditate, follow passion, get good sleep.

Your body is a sacred vessel — and it is home to trillions of living partners. Care for both, and they will serve you for a lifetime.