What Causes Purple Red Rash On Head Of Penis?

Hello my question is I m curious if I have a male yeast infection or not? About 5 or 6 months ago I had noticed a purple/ red rash under the head of my penis, it itched, burned, it took about a week for it to clear up and when it cleared up a white fluid came out. Since then there hasent been any reaccuring outbreaks such as herpes that s why I think it may not be herpes. But I have noticed it left a a little scaly line about 1/2 or 1 inch scar or uneven skin below the head of my penis. Every so often I have an irrating pain if I rub across it,it also feels kind of sticky or a little sticky under the head of my penis and if I put lotramin ultra the irration is gone but wares off and the scar like uneven skin is still there, if u could please help that would be very helpful.