Prickly heat or eczema?

Prickly heat often appears after sweating or hot, humid conditions as small prickling bumps in areas with limited airflow. Eczema may produce dry, scaly, cracked, or thickened patches and can flare with irritants, dryness, or a personal tendency to sensitive skin. The two can overlap, especially where heat and rubbing aggravate already inflamed skin. A rash is not enough to identify the cause; [Heat Rash](/conditions/heat-rash/) explains the sweat-related pattern, while [Skin Rash](/symptoms/skin-rash/) covers broader possibilities.

Keep the room and skin comfortably cool, wash without scrubbing, and pat dry. Choose loose fabrics and avoid fragranced washes, new cosmetics, or wool against the area. If the skin is dry, a bland emollient can reduce water loss; explore [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) for the treatment concept. A clinician may suggest a topical corticosteroid for eczema or another inflammatory diagnosis, but the strength, site, and course matter. Read about [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) and do not self-treat an uncertain rash with a strong product.

Contact a clinician when itch keeps disrupting sleep, the rash repeatedly returns, or the diagnosis is unclear. Get prompt help for increasing pain, warmth, swelling, pus, yellow crusting, fever, or rapidly extending [Skin Redness](/symptoms/skin-redness/). These features can signal infection or a more active inflammatory problem rather than uncomplicated prickly heat.

Which features favour eczema over heat rash in my case? Is my moisturiser suitable for this site? Would a prescribed steroid be appropriate, and how should I use it safely?