Please note: 8 things nullify (break) the Wudhu. They are called Nawaqis (breakers of) Wudhu.

There are 8 Nawaqis in Wudhu:

1. Discharging of Urine, Stool or the excretion of anything from the private parts of the body.
2. Discharging of gas or passing wind.
3. Vomiting as a mouthful.
4. To fall asleep lying down or by resting the body against something.
5. To faint due to some illness or any other reason.
6. Becoming insane or going mad.
7. Laughing aloud whilst in Namaaz.
8. Flowing of blood or matter from any part of the body.