I have these bumps on my penis shaft , what should i do

I have these on my penis shaft. they don't hurt but itch some times. I've these for about 3 years. I've been stressed. please help me. those are only on downside of the penis.

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to me looks like probably PPP which is natural. (i am not a doctor but i am almost certian it is nothing to be worried about) make sure hygene is good and avoid harsh soaps and shower gells, use soft gentle products only.