Offering Salah while there is blood in his underpants

Q 1: I offered some of the Five Obligatory Daily Prayers while my underwear was soiled with blood. I was aware that I was bleeding so I changed my underwear, but the blood did not stop and stained my new underwear. I continued to bleed because of excessive walking. I offered more than five Prayers in these clothes for I could not remove them. I searched for a cure and was treated from this disease that did not occur again, praise be to Allah. What should I do? Should I repeat the Prayers I performed in clothes stained with blood or were my Prayers valid taking into consideration that I was the Imam (the one who leads congregational Prayer) in some of these Prayers?

A: If the blood that soiled your clothes was much, you should (Part No. 5; Page No. 153) offer the Salah (Prayer) that you performed while wearing these clothes. This is because blood is Najis (impure) while Salah requires purity of body and clothes. If it is only a small amount of blood, there is no blame on you owing to the troubles you had; and in this case you are not obliged to repeat any Salah.The Salah of the people you led is valid and they do not have to repeat it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.