I had a not painful boil which was getting dry. then after shower the skin over my buttocks boil went away. i can see now dark red skin, not really bleeding, just super red like blood. it hurts to sit. how to heal this? is it bad?

It seems that the boil has burst open after the shower, leaving behind a red and painful area on the buttocks. It is important to keep the area clean to prevent any infection from occurring. One can clean the area with warm water and mild soap, and apply an antiseptic cream or ointment to prevent any further infection. It is also advisable to avoid sitting on it.