Topical treatment for heat rash

Heat rash forms when sweat is trapped near the skin surface, so thick greasy products can add occlusion and friction. The ideal approach depends on whether the skin is mainly prickly, inflamed, dry, broken, or showing signs of infection. Redness and small bumps can also come from contact dermatitis, eczema, or folliculitis. Checking the pattern helps prevent treating the wrong cause.

Cleanse gently with lukewarm water, pat dry, and allow the area to cool before applying anything. If surrounding skin is dry, a thin layer of fragrance-free moisturiser may support the barrier; see Emollient Therapy for general information. Avoid heavy oils, fragranced products, and products that sting. If a clinician identifies substantial inflammation, they may prescribe Topical Corticosteroids for a specific site and duration. Do not apply a steroid to broken or infected-looking skin without advice.

Seek medical advice if the rash does not improve, returns frequently, or worsens after a product. Prompt care is needed for pus, crusting, spreading warmth or redness, marked swelling, severe pain, blisters, fever, or feeling unwell. Stop a new product that causes burning, swelling, or a rapidly worsening reaction and ask for guidance.

Ask whether the product suits the affected body area, how often to apply it, and what changes mean you should stop. Mention pregnancy, allergies, broken skin, other medicines, and whether the rash is wet, crusted, painful, or itchy.