👉 A dermatalga, also known as a skin allergy, is an allergic reaction that occurs when your body reacts to something it doesn't recognize. It can be caused by substances like dust, pollen, mold, or even tiny insects. These allergens trigger an immune response in the body and cause symptoms such as itching, redness, swelling, and inflammation of the skin. Symptoms may vary from person to person, but they usually include difficulty breathing, sneezing, coughing, and a