Red Sploches on Tip of Penis

Patient: I just had sets a few hours ago and i found red sploches on the tip of my penis on the right side of the hole where i have been feeling very tender at to the touch not all the time but it’s painful to touch from time to time. i have noticed that that side of my penis is bigger then the other side of the hole so like a infection or something causing it to swell a little? It maybe why i’m having problems releasing all my urine since when I go pee a drop or to hang onto my penis.

Doctor: