Sarah Neal was spending her summer in rural Texas when she woke up one day with a strange, crawling sensation on her skin. However, little did she know, it would turn into a rapidly spreading rash ...

"I felt like a medical mystery," Sarah Neal tells PEOPLE of the painful rash that spread across her body and left her ...

Medically reviewed by Susan Bard, MD A rash under your breast may commonly be caused by warm temperatures, friction, or excess moisture. Sometimes, bacterial and fungal infections, eczema, allergic ...