Difficult to say for sure without evaluation. Herpes, syphillis or genital warts still can be considered.
A urine test as well as rectal exam looking for prostatitis can be considered. Blood tests can also be considered for syphillis.
Swabbing the lesions can also be done to confirm a diagnosis.
A referral to a dermatologist can also be considered for another opinion.
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.
kevinmd_