How do I deal with bad breath while fasting?
Yes, there's plenty you can do. Some change in your breath is normal when you fast, because your mouth is drier and you aren't eating. Good habits at suhoor, careful brushing and drinking enough water between iftar and dawn keep it under control. And Islam honors the fasting person's breath, so there is no need to feel embarrassed.
Why fasting changes your breath
When you don't eat or drink for hours, your mouth produces less saliva, and saliva is what normally washes away bacteria. The body also changes how it uses energy while fasting. The result is a dry mouth and a stronger smell, especially in the afternoon. This is a natural effect of fasting.
The Prophet ﷺ said, "The smell coming out from the mouth of a fasting person is better in the sight of Allah than the smell of musk" (Sahih al-Bukhari 1894). This honors the sacrifice of fasting. It doesn't mean you shouldn't look after hygiene. See Why does a fasting person's breath smell good to Allah?
Habits that help
- Brush after suhoor, including your tongue, where most of the smell comes from. A tongue scraper works well too.
- Brush again at iftar, and floss in the evening.
- Drink water steadily between iftar and suhoor, so your mouth starts the day well hydrated.
- Be careful with suhoor food. Garlic, raw onion and very spicy dishes linger. Choose oats, eggs, yogurt and fruit.
- Limit coffee and sugary drinks, which can dry the mouth or feed bacteria.
- Use a miswak during the day. See Can I use a miswak while fasting?
- Skip gum and mints in daylight, as they usually break the fast. See Can I chew gum while fasting?
Brushing during the day
Brushing your teeth while fasting is fine if you take care not to swallow water or toothpaste. Many people brush with a very small amount of paste, or use only a damp brush, in the afternoon. See Can I brush my teeth while fasting? Some scholars prefer to avoid brushing in the afternoon, and some prefer not to use paste. It's a matter of preference, so do what is easiest for you.
Being considerate of others
Islam values being pleasant to those around us, especially in the mosque. The Prophet ﷺ said that whoever eats garlic or onion should keep away from our mosque or stay at home (Sahih al-Bukhari 855). So skip strong garlic or onion at suhoor if you're going to taraweeh, or have it at iftar after prayers. If you notice a persistent bad smell even with good habits, see a dentist, since gum disease or cavities may be the cause.
- Dry mouth makes breath stronger when you fast, and it is normal.
- Brush your teeth and tongue after suhoor and at iftar.
- Drink water at night and avoid garlic or onion at suhoor.
- Use a miswak, and see a dentist if the smell doesn't go away.
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