Many people wake up with an unpleasant taste or smell in the mouth even after brushing the night before. Strong morning breath is common, but if it lasts all day the cause should be found.
- Bad breath on waking is common because saliva falls and bacteria multiply during sleep.
- Brushing carefully in the evening, cleaning the tongue and between the teeth and drinking water help reduce it.
- Mouth breathing and strong-smelling food in the evening make the smell worse.
- Odour that lasts all day, or comes with bleeding gums or decay, needs to be checked.
Bad breath on waking affects very many people, including those who keep their mouths clean. The main reason is the changes the body goes through during sleep, and it is rarely a sign that anything is seriously wrong.
Why does the mouth smell in the morning?
- Saliva falls during sleep, so the mouth is dry and less washed clean. Bacteria multiply, break down debris and give off odour.
- Mouth breathing during sleep dries the mouth even more.
- Strong-smelling food such as onion and garlic in the evening.
- Plaque left on the teeth and tongue from the night before.
Most of this odour fades quickly after brushing, drinking water and having breakfast.
How to reduce morning breath
- Brush carefully in the evening before bed and clean between the teeth with floss. See how to brush properly.
- Gently clean the tongue, because its surface holds a lot of bacteria.
- Drink a glass of water after waking and enough water through the day.
- Limit strong-smelling food and alcohol in the evening.
- If you often breathe through your mouth in sleep, look for the cause, such as a blocked nose.
Mouthwash is only a supporting step. See do you need mouthwash.
When should bad breath be checked?
- The smell lasts all day despite careful cleaning.
- Gums bleed, swell or recede, or there is a lot of tartar.
- There is tooth decay, or the mouth is often dry.
- There is a discharge or an odd taste in the mouth.
These signs may be linked to decay, gum inflammation or gum disease. You can read bad breath: causes and what to do. You can visit in person during working hours at 266A - 268, Đường 3 Tháng 2, Phường Hòa Hưng, Ho Chi Minh City, or call the hotline 028.3868.1097 (Zalo 082.299.3377) to ask about quieter hours.
Frequently asked questions
Why does my mouth smell when I wake up?
Saliva falls during sleep, so the mouth is dry and bacteria multiply and give off odour. Mouth breathing makes it drier. The smell usually fades after brushing and drinking water.
Is morning bad breath caused by a stomach problem?
Most bad breath starts inside the mouth, from plaque, a coated tongue or gum inflammation. If it lasts despite careful cleaning, see a dentist so the cause can be found.
When should bad breath be checked?
When the smell lasts all day despite careful cleaning, gums bleed or swell, there is tooth decay or the mouth is often dry.