![]() The timing of when medications are started and stops may provide important clues for establishing the cause of a rash. ![]() A family history of eczema, frequent exposure to sick children, necessary use of immunosuppressive medications, and exposure to multiple medications all increase the risk of developing rashes.Ī careful drug history that includes over-the-counter (OTC) medications, supplements, and prescription drugs such as birth control pills is also important. Many different risk factors determine what rash or rashes a patient might get. Sometimes good quality pictures of an earlier stage of the rash may aid diagnosis. Treatments that work may be a clue to the cause of the rash, may mask symptoms, or change the appearance, making a definite diagnosis harder. Accurate information about past treatments, successful and unsuccessful, is very important. All of these factors are important in identifying the correct diagnosis. Infectious agents that can cause a rash include viruses, bacteria, fungi, and parasites.ĭetermining the specific cause of rash usually requires a description of the skin rash, including its shape, arrangement, distribution, duration, symptoms, and history. Infection-associated rashes, such as ringworm (tinea), impetigo, Staphylococcus, scabies, herpes, chickenpox, and shingles, are treated by treating the underlying cause. Even a noncontagious, noninfectious rash can cause discomfort and anxiety. Many noninfectious rashes are typically treated with corticosteroid creams and/or pills. Noninfectious rashes include eczema, contact dermatitis, psoriasis, seborrheic dermatitis, drug eruptions, rosacea, hives ( urticaria), dry skin ( xerosis), and allergic dermatitis. While there are many different types, rashes may basically be divided into two types: infectious or noninfectious. Rashes may be divided into two types: infectious or noninfectious.
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