Single Red Spot on my penis wondering what it could be

I've had this single red spot on my penis, it is not itchy but I've had it for a while. Wondering what it could be. See picture attached.

image

Knowing whether you are sexually active or not is often a good starting place. If you have not had an opinion on the 2 brown marks, towards the front of the head of your penis, from a medical professional, I would go get both issues checked by a doctor …

I’ve had all marks since before I was sexually active.