what is this

Hello guys firstly I think I have some kind of penis/testis health ocd in last couple of months went to 4 doctors because I thought I got some penis or testis problems last time I was 3 days ago, and everytime it turned out just fine. I just look at my penis all the time for some reason looking for problems so 2 days ago I noticed that after the erection I have this veiny? bump on my penis... It dissaperes after few hours of erection and I cant see it when I have the erection... what could it be is it vein or maybe just skin?? or maybe something dangerous??? pls help. Here is the pic btw sry I didnt clean myself it was yesterday night after erection now I cant make it pop for some reason... https://ibb.co/ynbBC5R

can anyone pls give their opinion

I dont think Ive ever come across a vein that looks like that. They are usually more pigmented—blue or purple in tone— and yours looks flesh colored (maybe it photographs differently).

are you sure its not just some loose skin?

Well I just said it could maybe be the vein because it looks long… But it could be skin too actually. I actually dont have that right now only when my penis is going from erect state to flaccid… I guess skin is decresing its size then so this could happen? Just the thing is I never heard or seen that people have loose skin on glans itself…?