wounds on nipples is it dangerous?

Rashes are usually a symptom of an allergy. Your friend could be allergic to something in her soap, shower gel, shampoo, jewellery or clothing, or it could be a food allergy that is causing the rash. It is probably not dangerous, but she should seek medical advice and not be scared. Most allergies can be treated or prevented, but she will need to be tested to find out what is causing it.

It was just some sort of allergy I think. Get medical attention, the rashes sounds like a minor condition but it is required to see the doctor.

Rashes as mentioned are generally a sign of some type of allergic reaction BUT the thing she may be reacting to could be anything from new soap to a reaction to a virus or illness. Her best bet if it doesnt go away is to go to the doctor