i am very sorry but a diagnosis requires an examination -- not something that can be accomplished on webmd answers. your description is vague and the possibilities are numerous. since the penis is covered by skin and you have a dermatologist seeing this professional would be advisable. an accurate diagnosis -- not a blind guess -- is essential to get a patient-specific treatment regime. in most cases your treatment will involve a prescription medication again not something that can be provided to you on-line.
what is this rash on my penis? . i developed a red rash on the top and underside of my penis. i had unprotected sex with a girl about a week ago and we failed to use enough lubrication. my penis was red and sore after. i had a small skin colored bump for about a month prior to this that i had my dermatologist treat with cantharidin and the next day i noticed that there was a little more irritation. the skin in this area is very dry and i have been diagnosed with seborrehic dermatitis on my face and thighs. please help dx.