Medically reviewed by Renee Nilan, MDMedically reviewed by Renee Nilan, MD COVID arm rash is a delayed hypersensitivity reaction that occurs approximately five days after the COVID-19 vaccine.

Unlike most rashes, hives: Hives can develop anywhere on the body, but most commonly appear on the chest, neck, arms, and legs. If you have hives Hives can have a few different causes, including ...

BLONZ: I have an unfortunate tendency to develop hives and was told that a low-histamine diet can help in some cases. I have been having difficulty finding a list of foods showing histamine content.-- ...

It can spread to other parts of your body, including your back, breasts, arms, and buttocks. A PUPPP rash usually goes away on its own and doesn’t cause any scarring or lasting skin color changes.