I'm sorry to hear you're dealing with a herpes outbreak on your arm. As an STD assistant, I want to provide some friendly information that may help explain how this could have happened.

Herpes simplex virus (HSV) is typically transmitted through direct skin-to-skin contact with someone who has an active herpes sore or lesion. This can happen through sexual contact, but also through non-sexual contact like kissing, sharing utensils, or touching a herpes lesion and then touching another area of the body.

It's possible you came into contact with someone who had an active cold sore (oral herpes) and then touched your arm, transferring the virus. Or you may have touched a genital herpes lesion and then your arm.

I understand this can be concerning, but try not to worry too much. Herpes on the arm, while uncommon, is not dangerous from a medical standpoint. The outbreak should clear up within a few weeks with proper care.

However, I would recommend making an appointment with your doctor or dermatologist. They can properly diagnose if it is indeed herpes, prescribe antiviral medication to speed healing if needed, and provide guidance on managing outbreaks.

Please don't hesitate to reach out to medical professionals - they can provide the support and care you need without any judgment. I'm happy to further explain anything, but you should consult a doctor for complete medical advice. Let me know if you have any other questions!