Penis skin conditions

Hello guys, i need your help. Currently, i have these skin conditions. 1. There are 2 small like pimple in the shaft of my penis. Not itchy nor painful. I just noticed that it's filled with blood or something. 2. Black small patch in the neck of my penis. I just noticed this a month ago and it doesn't go away. Now i can feel a little bit itchy but not painful. Sometimes im uncomfortable because of this. Not sure if it's just a psychological effect. 3. I have this a small black skin bulge. I got this for years already. It doesnt go away either and it's not itchy. Could any of these is a concern as im afraid that i could infect my partner because of this. Hope you could help me. Thank you.

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