Cannot say without looking at the lesions. Possibilities can include various types of STDs (herpes, genital warts). Cysts or fungal infections can be considered if the evaluation for STDs is non-revealing.
You may want to consider seeing your personal physician or a dermatologist for further evaluation. If herpes is considered, the lesions can be swabbed and sent out for diagnosis.
With any
penileCancer - penis lesions, it may be a good idea to be screened for
urethritisChlamydial urethritis - male
Urethritis and prostatitis. A urinalysis and digital rectal exam is a reasonable initial approach.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
http://www.straightfromthedoc.com