Which skin diseases affect both mouth and urethra?

Q: Are there any skin diseases that affect both mouth and urethra?

A:There are a number of diseases which simultaneously affect various parts of the body including the mouth and the genitals. Only a few examples: syphilis, viral warts, recurrent genital ulcerations, lichen planus, etc. If you have something, go and consult a dermatologist. You should not attempt to treat yourself.