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  1. Sep 7, 2021 · It could be a sign that your rash is a severe allergic reaction to a medication or caused by an autoimmune condition called pemphigus vulgaris. 6. You see signs of infection in the rash. Rashes ...

    • Eczema (atopic dermatitis) What it looks like: Eczema is an umbrella term that refers to several conditions that all cause inflamed skin, the American Academy of Dermatology explains.
    • Seborrheic dermatitis. What it looks like: What we commonly refer to as dandruff is actually a condition called seborrheic dermatitis of the scalp, Hu says.
    • Psoriasis. What it looks like: Psoriasis is another inflammatory condition that dermatologists see frequently, which causes scaly, itchy areas of thickened skin called plaques.
    • Acne. What it looks like: Acne is another rash that dermatologists see frequently. “It is common in adolescents and teenagers, but it’s not just a skin condition for young people,” Lipner says.
  2. Nov 17, 2023 · One of the most common causes of rashes — contact dermatitis — occurs when the skin has a reaction to something that it has touched. The skin may become inflamed, and the rash tends to be ...

  3. Age, stress, fatigue, weather extremes, oily skin, infrequent shampooing, and alcohol-based lotions aggravate this harmless but bothersome condition. Other common causes of a rash include: Eczema (atopic dermatitis) -- Tends to happen in people with allergies or asthma. The rash is generally red, itchy, and scaly.

  4. Mar 25, 2024 · A skin rash is irritated or swollen skin caused by any reason, such as heat rash or hives. Skin rashes have many causes and vary widely in appearance. For example, they can be dry, moist, bumpy, smooth, cracked, and/or blistered and may involve itching, pain, color changes, or pus and oozing if infected.

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  6. Apr 26, 2022 · Psoriasis. 4 /19. Thick, red patches of skin covered with white or silvery scales are signs of psoriasis. Doctors know how psoriasis works -- your immune system triggers new skin cells to grow too ...