Do symptoms like abdominal skin redness go away quickly?

Depends on cause: This depends on the cause. If infection (cellulitis), this needs antibiotics. If sunburn, it will improve. If eczema or psoriasis, it may linger unless treated. There are a large number of reasons for skin redness, and an answer depends on the cause of the redness.

Diagnosis first: 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!