Rashes involve changes in the color or texture of your skin.
Skin redness or inflammation; Skin lesion; Rubor; Skin rash; Erythema
Often, the cause of a rash can be determined from its visible characteristics and other symptoms.
A simple rash is called dermatitis, meaning inflammation of the skin. Contact dermatitis is caused by things your skin touches, such as:
Seborrheic dermatitis is a rash that appears in patches of redness and scaling around the eyebrows, eyelids, mouth, nose, trunk, and behind the ears. If it happens on your scalp, it is called dandruff in adults and cradle cap in infants.
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:
Many medical conditions can cause a rash as well. These include:
Most simple rashes will improve with gentle skin care and by avoiding irritating substances. Follow these general guidelines:
Hydrocortisone cream (1%) is available without a prescription and may soothe many rashes. If you have eczema, apply moisturizers over your skin. Try oatmeal bath products, available at drugstores, to relieve symptoms of eczema, psoriasis, or shingles.
When to Contact a Medical Professional
Call 911 if:
Call your health care provider if:
What to Expect at Your Office Visit
Your health care provider will perform a physical examination and ask questions about your medical history and symptoms. Questions may include:
Tests may include:
Depending on the cause of your rash, treatments may include medicated creams or lotions, medications taken by mouth, or skin surgery.
Many primary care providers are comfortable dealing with common rashes. For more complicated skin disorders, you may need a referral to a dermatologist.
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Garber B, Cydulka RK. Dermatologic presentations. In: Marx JA, Hockberger RS, Walls RM, et al, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 8th ed. Philadelphia, PA: Elsevier Saunders; 2013:chap 120.
Shofner JD, Kimball AB. Plant-induced dermatitis. In: Auerbach PS, ed. Wilderness Medicine. 6th ed. Philadelphia, PA: Elsevier Mosby; 2011:chap 63.
Werth VP. Principles of therapy of skin diseases. In: Goldman L, Ausiello D, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 445.