Prayer: Blood from Unhealed Wounds and Sores
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 835
If blood from a wound, sore, or boil is on the body or clothing of someone performing prayers, he can perform prayers with that blood as long as the wound, sore, or boil has not healed. The same applies to pus that comes out with blood or any medicine that is applied to the wound and becomes impure.