Rash related, what could it be?

Vague question: Can you please be more precise with you question? Are you asking about the various causes of a skin rash ?

Rash: Hi, it’s hard to say without a picture but there is a great app that may be able to help you get a diagnosis without being seen in person by a dermatologist. The app is called VisualDX and is one of the best, if not the best out there. Many clinicians, including myself, use it. Just snap a photo and it gives you a list of possible diagnoses. Good luck!