In an allergic reaction, the immune system starts fighting substances that are usually harmless as though these substances were trying to attack the body. This overreaction can cause a rash.
For most people, allergies mean itchy eyes and a drippy nose. But for a few people, allergies to things like bee stings or nuts cause a whole-body reaction that can be life-threatening. Whether your allergies are dangerous or just annoying, the information in our Learning Center can help you cope.
Contact dermatitis is a skin rash caused by something that touches the skin and makes it irritated and inflamed. Your skin may be red, swollen, dry, and may be cracked. Blisters may form and ooze. The rash will itch.