3. Food allergies
It is one of the most common causes of allergies, and sometimes one of the most dangerous. Food allergies cause raised bumps in the skin that often join together, creating a large raised, reddened and warm area in your skin. This skin reaction appears shortly after eating the foods you’re allergic to, and it can be faster and more aggressive in some cases. One of the most dangerous types of food allergies is peanuts and seafood allergies, which can cause anaphylaxis, a life-threatening allergy that causes swelling to your throat and other severe manifestations. Allergies to drugs and medications may also have the same mechanism and similar skin reactions.