I am sorry to hear about your penis lesion. It is not possible to provide an accurate diagnosis without fully reviewing your medical history and performing a thorough physical exam, including a genital exam. Therefore, I encourage you to schedule an appointment with a primary care doctor
. After a full, in-person evaluation, the doctor can determine whether you need any additional tests.
In any person with a genital lesion, it is important to rule out a sexually transmitted disease. Even if you are confident in your sexual partner's own sexual history, it is safest to still rule out a sexually transmitted disease. As you mentioned, syphilis often causes a painless lesion on the genitals. Untreated syphilis can be devastating and is eventually fatal. Other possibilities include chancroid, genital warts
, and HIV. You will need to undergo a physical exam and additional testing to rule these out. It is also possible this bump is due to a benign blood vessel abnormality. Trauma during intercourse or masturbation can cause a penis lesion. Additionally, it is possible this is due to a primary dermatologic issue. All of these possibilities require thorough evaluation by a physical to rule out. Therefore, I encourage you to schedule an appointment with a primary care doctor.