the dermatologist believes i have lichen planus on the penis caused by trauma to the area during sex. i have had a bump on my urethra and redness around the head of the penis for 8 months now. all std tests have been negative, numerous times, and the doctors say it definitely does not look like hpv, but the incident happened 6 weeks after a risky sexual encounter. the area has been treated with desonide, triamconolone acetonide, and topicort, all corticosteroids which have not really helped. the next step is a biopsy on the bump. they were telling me that because the area was treated a biopsy may not help. i was wondering if anyone had any thoughts on whether or not i should take the risk of a biopsy, and what the chances are it tells me what this is exactly. i dont want to deal with the pain or risk of complication of a biopsy on my urethra if there is not a good chance it helps solve this problem. any help is appreciated, thanks