The Prophet Muhammad, peace be upon him, taught and lived out a set of clean, healthy habits that protect the body and keep germs away. Building these into a daily routine is following his Sunnah, a practice he himself followed, not just good practice on its own.
Istinjaa
Istinjaa is the thorough cleaning of the private parts after passing urine or stool, using water and toilet paper.
Being careful and unhurried about this matters more than it might seem. It is reported that most of the punishment of the grave comes from carelessness about small droplets of urine left on the body or clothing, so this is worth doing thoroughly rather than rushing it.
- Clean the private parts with water and toilet paper after passing urine or stool.
- Use the left hand only. The Prophet Muhammad, peace be upon him, prohibited using the right hand for istinjaa.
- Wash at least three times, so you can be confident nothing remains.
Bathing
Bathing daily keeps the body clean and healthy: it washes away germs, dirt, sweat and bad odours. Beyond a regular morning or evening bath, it is worth bathing again after swimming, sport, or any activity that leaves you visibly dirty.
Use water and soap, and rub the body properly with a sponge or cloth so nothing is left behind. Bathing is a Sunnah, a practice the Prophet Muhammad, peace be upon him, followed himself, and it is part of living out the Deen, our religion, properly, not only a matter of physical comfort.
Washing Your Hands
Washing the hands with soap and water is a beautiful Sunnah of the Prophet Muhammad, peace be upon him, and the simplest way to stay healthy. Hands pick up dirt and germs constantly through the day, and washing them properly is what removes that risk before it becomes illness.
- Wash your hands on waking, whenever they look dirty, and after using the toilet.
- Wash before and after eating, and before handling food.
- Wash after coughing, sneezing or blowing your nose, and after touching an animal.
- Wash on returning home from being out.
- Wet your hands with running water, rub soap over them thoroughly for about twenty seconds, rinse fully, then dry with a clean towel.
Caring for Your Nails
Long nails trap dirt and germs that ordinary hand washing does not reach. The Prophet Muhammad, peace be upon him, taught clipping the nails once a week, ideally on Thursday night or on Friday before Jumuah, the Friday congregational prayer.
The source also discourages women from using nail polish, describing it as unhealthy and against what is taught.
- Scrub under the nails with a nail brush when you wash your hands.
- Avoid biting or chewing your nails.
- When you clip your nails, gather the clippings in tissue and bury them rather than burning, flushing or throwing them away; they are part of the body and are treated with the same respect.
Taking Care of Your Hair
Keeping the hair combed and tidy is part of good hygiene. Women are taught to tie their hair back or plait it; the Prophet Muhammad, peace be upon him, taught washing the hair at least once a week, with Friday as the Sunnah day, and rinsing it fully so no shampoo is left behind.
Oiling the hair regularly is another Sunnah; it helps the hair grow strong and stay healthy, and along with regular washing, it helps avoid lice. Men are taught to trim their hair regularly, and to avoid haircuts with uneven lengths or a partly shaved head, and styles that deliberately copy non-Muslims.
The source also teaches covering the head for certain activities: helping in the kitchen, using the toilet, eating, studying, and being outside at night, especially around Maghrib.
Keeping Your Nose Clean
The nose does real work: it lets us breathe and smell, and it traps dirt before it reaches the lungs. Looking after it is part of looking after the whole body.
- Use a clean tissue to wipe your nose rather than your clothes or hands.
- Cover your nose and mouth when you sneeze; this is a Sunnah of the Prophet Muhammad, peace be upon him.
- Throw used tissues in the bin, and wash your hands after blowing your nose or sneezing.
- Avoid picking your nose.
- During wudhu, it is Sunnah to wash inside the nose and blow it clean three times.
Keeping Your Mouth Clean
Healthy eating supports healthy teeth: plenty of fruit, vegetables and water, and less of the sweets and soft drinks that damage them. Garlic and onions are common causes of bad breath, so rinsing the mouth after eating them helps.
It is Sunnah to gargle the mouth three times during wudhu. Beyond that, brushing the teeth, and the tongue, twice a day, in the morning and before sleeping, is what actually prevents the plaque that leads to rotten teeth and bad breath.
The Miswaak
The miswaak is the toothstick the Prophet Muhammad, peace be upon him, used to clean his own teeth, and using it was something he loved. Reported benefits include pleasing Allah, practising a Sunnah, a clean mouth and a pleasant smell, and it is said to help a person recite the kalimah, the declaration of faith, at the time of death.
It is reported that praying salaah after cleaning the teeth with a miswaak during wudhu earns seventy times the reward of praying without it.
- Use the miswaak before and after eating, before sleeping, on waking, during wudhu, and before reading Qur'an or studying.
- To prepare it, peel a small section of bark from the tip and chew it lightly until it opens into soft bristles.
- Hold it with the three middle fingers resting on top and the thumb and little finger underneath.
- Brush gently, sideways across the teeth.
- Store it in a dry place between uses.
Using Itr (Perfume)
Itr is a fragrance worn on the body or clothes, and using it, rather than alcohol-based perfume, is a Sunnah of the Prophet Muhammad, peace be upon him, who loved a pleasant smell and whose own favourite itr was musk and oudh. It is Sunnah to wear it on Fridays, on the days of Eid, at Islamic gatherings, and when seeking knowledge.
Going without regular washing leaves an unpleasant body odour, so bathing and wearing itr together are what keep a person smelling clean, not one without the other. A woman may wear perfume inside her own home, but is taught not to wear it when she leaves it; a little is enough, in any case, for anyone.
Building the Habit
None of these habits need to be perfect from day one; they are small, repeatable actions that become natural the more consistently they are practised. The person to look to for how to do this well is the Prophet Muhammad, peace be upon him, who was known for being clean and neat, and who taught these very habits to the people around him.