Even herpes cannot be ruled out as it is spread through direct skin-to-skin contact during oral, genital, or anal sex with an infected partner.
Hello, Without examination,confirmation of a diagnosis is tough but it can be folliculitis,contact dermatitis,rash due to friction rub with clothes, dermatitis (atopic, contact, allergic),excessive sweating causing sweat dermatitis or balanitis(due to an underlying infection (bacterial and fungal as well as other organisms).