Ghusl is allowed during fasting. It is similar to wudhu! You should take care not to swallow any water. Water in the ears doesn’t break the fast

How to take ritual bath while fasting because I fear when that I take ritual bath especially when sniffing up water in nose and rinsing mouth and I feel water went inside my throat or may be it is whispers. If water goes inside ear canal does it break fast?

Fasting, Purity |