Do I have to worry about the spot on my penis shaft?

Hi,

Welcome to icliniq.com.

I understand your concern. The problem is that you did not mention the period between the appearance of the lesion and the STD (sexually transmitted diseases) test. For example, syphilis, which could cause such lesions in stage 1 and has a diagnostic window of about 10 to 12 weeks. If the lesion was there already (before three months) and you tested now, the test would be valid. Shorter intervals make the result invalid. That is the case with many STDs (human immunodeficiency virus - 10 to 16 weeks, hepatitis C virus - three to six months, and syphilis - 10 to 12 weeks). So, I suggest you repeat the standard syphilis test - Treponema pallidum hemagglutination (TPHA) when you are sure that 12 weeks have passed. If it is still negative, then a tiny biopsy probe (which does not hurt) can be taken to check what is wrong with the skin. Visual diagnoses of the skin are extremely unreliable. Therefore, I would always suggest a small diagnostic biopsy. Kindly revert in case of further queries. Thank you.