Sweat rash on the inner elbow: what to know

The crease behind the elbow warms up as the arm bends, and sweat can remain against the skin. Heat rash may appear as prickling, itchy redness or fine bumps. Repeated rubbing, tight sleeves, fragranced products and dry skin can intensify the irritation. A thick, scaly or repeatedly returning rash in this crease may fit eczema more closely, while a sharply outlined rash after a new product may suggest contact dermatitis.

Cool the area, rinse gently and pat it dry, especially after exercise or hot weather. Wear light, loose sleeves and avoid scratching, hot water, perfumed lotions and rough fabrics. Keep nails short to limit skin damage from rubbing. If the surrounding skin is dry, [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) may help when chosen with professional guidance. A [Topical Corticosteroid](/treatments/medical-dermatology/topical-corticosteroids/) can be appropriate for some inflammatory rashes, but diagnosis and the correct strength matter. Related symptoms are described under [Skin Redness](/symptoms/skin-redness/).

Have the rash assessed if it is spreading, persistently itchy, cracked, weeping, painful or repeatedly returning. Seek prompt help if the area becomes hot and swollen, develops pus, or is accompanied by fever or feeling unwell. A rash that affects other elbow creases or several body areas may need assessment for eczema, allergy, infection or another inflammatory condition.

Ask whether the pattern is heat rash or eczema, which moisturiser is suitable, and whether treatment should be applied to the crease. Tell the clinician about sweating, new detergents, fabrics, cosmetics, allergies, cracking and any previous episodes.