From the Guidelines
Heat rash can be effectively treated by cooling the affected skin, reducing sweating, and using topical corticosteroids or systemic antihistamines in severe cases. To manage heat rash, it is essential to move to a cooler, less humid environment and wear loose, lightweight clothing. Keeping the skin clean and dry by taking cool showers or baths and patting the skin dry afterward is also crucial.
Key Treatment Measures
- Apply calamine lotion to soothe the affected area, or use a mild over-the-counter hydrocortisone cream (0.5-1%) up to twice daily for 2-3 days to reduce inflammation and itching 1.
- Avoid using heavy ointments or creams that contain petroleum or mineral oil, as these can block pores and worsen the condition.
- For severe itching, an oral antihistamine like diphenhydramine (Benadryl) 25-50mg every 4-6 hours may help.
- Moisturizing regularly, protecting against excessive exposure to sunlight, and using SPF 30 UVA and UVB protective sunscreen appropriately can also help prevent heat rash 1.
Additional Considerations
- Heat rash typically resolves within a few days with these measures.
- The condition occurs when sweat ducts become blocked, trapping sweat beneath the skin and causing inflammation.
- If the rash worsens, shows signs of infection (increasing pain, swelling, warmth, or pus), or doesn't improve within a few days, consult a healthcare provider.
- Greasy creams, manipulation of skin, hot blow-drying of the hair, wearing of tight shoes, and topical acne medications should be avoided as they can exacerbate the condition or lead to further complications 1.
From the FDA Drug Label
Directions for itching of skin irritation, inflammation, and rashes: adults and children 2 years of age and older: apply to affected area not more than 3 to 4 times daily The treatment for heat rash may involve applying hydrocortisone to the affected area, with a maximum application of 3 to 4 times daily for adults and children over 2 years of age.
- For children under 2 years of age, it is recommended to ask a doctor.
- For children under 12 years of age, it is also recommended to ask a doctor before applying the treatment 2