Penis rash?

Sexual health
1

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rash showed up, noticed while peeing, am sexually active with my girlfriend but she was a virgin before and in faithful, any ideas if its dangerous?
2

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heres another picture, it showed up one day as a lump after i finished masterbating and went to pee, the lump was gone the next day but left this

3

Its not dangerous and will heal by itself. Its usually caused by irritation.