Knowing what breaks wudu helps you stay confident that your prayer begins in a state of purity.
Common Nullifiers
Using the bathroom, passing gas, deep sleep, and the flow of blood or pus from the body are among the most commonly recognised things that break wudu.
Everyday Situations to Be Aware Of
A light doze while sitting upright is often treated differently from lying down in deep sleep, so it helps to know the general rulings your school of thought follows.
When in Doubt
If you’re unsure whether your wudu is still valid, the general principle is to assume it remains valid unless you’re certain something happened to break it.
Keeping a simple mental checklist makes it easier to know when it’s time to renew your wudu before the next Salah.