Rash in Adults

Common Causes

• Contact dermatitis — Skin may react to irritants like soaps, detergents, or allergens such as nickel or poison ivy, leading to red, itchy patches.
• Eczema (atopic dermatitis) — Chronic inflammation might flare up due to genetics, allergies, or dry skin, causing dry, itchy areas.
• Hives (urticaria) — Allergic reactions to foods, meds, or stress could cause raised, itchy welts that come and go.
• Psoriasis — An immune system issue may lead to thick, scaly patches, often on elbows, knees, or scalp.
• Drug rash — Certain medications might trigger red spots or hives as a side effect.

Learn More

For a full overview of this symptom, including home remedies and when to see a doctor, read our complete guide on Rash.