Cleanliness and Hygiene in Islam

Before a Muslim stands in prayer, he washes. Five times a day, every day, the hands, mouth, nose, face, arms, head and feet are cleaned with water. That simple habit says a great deal about Islam: worship and cleanliness belong together. Long before modern public health, Islam made purity of body, clothes, home and street a religious duty.

Purity is half of faith

The Prophet ﷺ put purity at the very heart of religion:

…Cleanliness is half of faith…

The Qur’an tells us that God loves those who turn to Him in repentance and those who keep themselves pure:

وَيَسْـَٔلُونَكَ عَنِ ٱلْمَحِيضِ ۖ قُلْ هُوَ أَذًۭى فَٱعْتَزِلُوا۟ ٱلنِّسَآءَ فِى ٱلْمَحِيضِ ۖ وَلَا تَقْرَبُوهُنَّ حَتَّىٰ يَطْهُرْنَ ۖ فَإِذَا تَطَهَّرْنَ فَأْتُوهُنَّ مِنْ حَيْثُ أَمَرَكُمُ ٱللَّهُ ۚ إِنَّ ٱللَّهَ يُحِبُّ ٱلتَّوَّٰبِينَ وَيُحِبُّ ٱلْمُتَطَهِّرِينَ ﴿٢٢٢﴾

And they ask you about menstruation. Say, "It is harm, so keep away from wives during menstruation. And do not approach them until they are pure. And when they have purified themselves, then come to them from where Allah has ordained for you. Indeed, Allah loves those who are constantly repentant and loves those who purify themselves."

And it praises the worshippers of an early mosque founded on piety because they loved to purify themselves:

لَا تَقُمْ فِيهِ أَبَدًۭا ۚ لَّمَسْجِدٌ أُسِّسَ عَلَى ٱلتَّقْوَىٰ مِنْ أَوَّلِ يَوْمٍ أَحَقُّ أَن تَقُومَ فِيهِ ۚ فِيهِ رِجَالٌۭ يُحِبُّونَ أَن يَتَطَهَّرُوا۟ ۚ وَٱللَّهُ يُحِبُّ ٱلْمُطَّهِّرِينَ ﴿١٠٨﴾

Do not stand [for prayer] within it - ever. A mosque founded on righteousness from the first day is more worthy for you to stand in. Within it are men who love to purify themselves; and Allah loves those who purify themselves.

So purity in Islam has two sides that go together: inner purity of the heart from sin, and outer purity of the body from dirt. A Muslim seeks both.

Wudu and ghusl

The Qur’an itself describes the washing before prayer, and in the same verse gives the full bath and the dry alternative:

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِذَا قُمْتُمْ إِلَى ٱلصَّلَوٰةِ فَٱغْسِلُوا۟ وُجُوهَكُمْ وَأَيْدِيَكُمْ إِلَى ٱلْمَرَافِقِ وَٱمْسَحُوا۟ بِرُءُوسِكُمْ وَأَرْجُلَكُمْ إِلَى ٱلْكَعْبَيْنِ ۚ وَإِن كُنتُمْ جُنُبًۭا فَٱطَّهَّرُوا۟ ۚ وَإِن كُنتُم مَّرْضَىٰٓ أَوْ عَلَىٰ سَفَرٍ أَوْ جَآءَ أَحَدٌۭ مِّنكُم مِّنَ ٱلْغَآئِطِ أَوْ لَٰمَسْتُمُ ٱلنِّسَآءَ فَلَمْ تَجِدُوا۟ مَآءًۭ فَتَيَمَّمُوا۟ صَعِيدًۭا طَيِّبًۭا فَٱمْسَحُوا۟ بِوُجُوهِكُمْ وَأَيْدِيكُم مِّنْهُ ۚ مَا يُرِيدُ ٱللَّهُ لِيَجْعَلَ عَلَيْكُم مِّنْ حَرَجٍۢ وَلَٰكِن يُرِيدُ لِيُطَهِّرَكُمْ وَلِيُتِمَّ نِعْمَتَهُۥ عَلَيْكُمْ لَعَلَّكُمْ تَشْكُرُونَ ﴿٦﴾

O you who have believed, when you rise to [perform] prayer, wash your faces and your forearms to the elbows and wipe over your heads and wash your feet to the ankles. And if you are in a state of janabah, then purify yourselves. But if you are ill or on a journey or one of you comes from the place of relieving himself or you have contacted women and do not find water, then seek clean earth and wipe over your faces and hands with it. Allah does not intend to make difficulty for you, but He intends to purify you and complete His favor upon you that you may be grateful.

Wudu (ablution) means washing the face, the arms to the elbows, wiping the head, and washing the feet to the ankles; the Sunnah adds washing the hands, rinsing the mouth and cleaning the nose. A step-by-step guide is in how to make wudu.

Ghusl is a full bath, required after marital relations and at the end of menstruation and post-natal bleeding. The Prophet ﷺ also urged a bath before the Friday prayer, and some scholars held it to be obligatory (Bukhari 879).

Tayammum, dry ablution with clean earth, is allowed when water cannot be found or would cause harm. The verse closes by explaining that God’s aim is not hardship but cleansing, and the completion of His blessing. Purity is a duty, never a hardship beyond one’s means.

A clean body, clothes and home

One of the very first commands given to the Prophet ﷺ was:

وَثِيَابَكَ فَطَهِّرْ ﴿٤﴾

And your clothing purify

A Muslim’s prayer is not valid if his body, clothes or place of prayer are soiled with impurities such as urine or blood. After using the toilet, Muslims clean themselves, preferably with water, and the Sunnah even teaches which hand to use (Muslim 606).

The Prophet ﷺ also taught a set of grooming habits that belong to fitrah, the natural human disposition:

…Five practices are characteristics of the Fitra: circumcision, shaving the pubic region, clipping the nails and cutting the moustaches short…

The Arabic text of the same hadith also lists removing the hair of the armpits.

He loved clean teeth and fresh breath. He used the siwak, a natural toothstick from the arak tree, and said it purifies the mouth and pleases the Lord (Nasai 5). He wished his followers would use it before every prayer, but held back from making it a duty out of mercy:

Narrated Abu Huraira: Allah's Messenger (ﷺ) said, "If I had not found it hard for my followers or the people, I would have ordered them to clean their teeth with Siwak for every prayer

He also told anyone who wakes from sleep to wash his hands before putting them into a vessel of water, because he does not know where his hands have been during the night (Bukhari 162). Fourteen centuries later, handwashing is still one of the simplest ways to stop the spread of disease.

Clean water, clean streets

Islamic cleanliness does not stop at one’s own door. The Prophet ﷺ forbade urinating in still water that others will use for washing (Bukhari 239). He warned against fouling the places people walk and rest:

…Be on your guard against two things which provoke cursing.…

When asked what they were, he said: relieving oneself on people’s roads or in their shade. And he counted the humblest act of faith as removing something harmful from the road (Muslim 153). Litter, pollution and blocked streets are not only bad manners; for a Muslim, they touch faith itself. See also the environment in Islam.

Common misunderstandings

Is ritual purity just a ritual? It is worship, done because God commanded it, but it is also real hygiene. Washing the face, mouth, nose, hands and feet several times a day keeps the body clean in a way anyone can see.

Does a person become dirty in some spiritual sense? No. When Abu Hurayra avoided the Prophet ﷺ because he needed a bath, he was told that a believer does not become impure in that way (Bukhari 283). The rules concern readiness for prayer, not the dignity of the person.

Is Islam obsessive about cleanliness? No. The Prophet ﷺ made wudu with about one mudd of water, well under a litre (Bukhari 201); wasting water is disliked even in worship, and scholars warn against excessive doubt about whether one is clean. The rule is clear, easy and balanced: be clean, be ready for prayer, and do not harm others.