I faced an unknown pimple in my genital area

hi about 3 weeks ago i noticed a kind of skin tag or something else which was on my penis skin. gradually this unknown thing became smaller and now its fixed in size. first i thought its a kind of rash because of allergy which lots of time i face it in my genital area, but now i am really scared that it's a kind of genital wart that maybe i got it in the massage centre by the therapist skin touch. i need help for diagnosing and solving this matter

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thanks

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