Dear Flame, Your rash and abdominal pain might be linked or maybe two different conditions. You should get a visual examination done by a physician. The rash might be a superficial infection and abdominal pain and nausea might be because of a (separate) stomach/intestinal condition. To relieve your symptoms you can use superficial soothing creams and anti-allergic medication available over the counter. If you develop any other symptoms you must immediately visit a doctor. Do well.