Fixed Drug Eruption Chronic Pain

Patient: I had a fixed drug eruption due to Bactrim, I had one lesion on my scalp, one on my hip, three in the pubic region, one on my scrotum, and the foreskin and glans were also affected. Where the foreskin was affected I know have chronic pain, especially where the frenulum is and there appears to be small lumps, most likely scars, around the circumcision scar. These are painful mostly only when i have an erection. Should I go back to my dermatologist or see a urologist?

Symptoms: Chronic pain/discomfort