Extra skin or penis top. Nd white spots.

Last year in april at the time of bath i am cleaning my penis and suddenly my penis skin got full backwards down nd after that i got tensed nd in fear also but in few min.. i take my penis skin to its normal position. After some days it happens again my skin got fully goes down nd again i take it to its Normal position but after 2nd time there is some extra skin comes on the top of my penis but i ingnored it because i am not feeling any problem or any thing else but now i am facing some issues on it from last one month. Now  There are coming some white spots on my penis top skin. Please tell me How should i manage it nd how i remove or do anything about axtra skin. Some times after sex my penis top skin got some cuts also i consult to normal clinic doctor in my area for penis top skin cut he gives me quizz cream it helps me in cuts or penis top but don't help in penis extra top skin nd white spots .