Tiny red spot shaft of penis

i had problem with urine and last time i went like two month back to std chrck negative chlaymydia n gonno2 week n another 1 month NEGATIVE THEN HIv N SYPHILIS twas 6 week since exposure NEGATIVE THE SECOND TIME month after exposure nurse look at my penis ring said is PPP now this tiny red spot i find i dont know what it is im worry.

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