Heat Rash

Diagnosis

Most cases of heat rash can be diagnosed through a simple physical examination. Your healthcare provider will typically identify it by visually inspecting the skin. No laboratory or imaging tests are usually needed.

A similar-looking condition, called transient neonatal pustular melanosis (TNPM), can sometimes be mistaken for heat rash. TNPM mainly affects newborns with brown or Black skin and is harmless. It usually clears up on its own within a few days without any treatment.

Treatment

The main goal of treating heat rash is to cool the skin and prevent further exposure to heat. Once your skin temperature returns to normal, mild cases of heat rash often resolve quickly without complications.

Self Care

You can take several steps at home to soothe your skin and promote healing:

• Cool the skin: Apply a cool, damp cloth to the affected area or take a cool shower or bath. Let your skin air-dry afterward.

• Avoid oily or greasy products: Skip heavy moisturizers, sunscreens, or cosmetics that can clog pores.

• Use suitable moisturizers: If needed, use a moisturizer containing wool fat (anhydrous lanolin) to help prevent sweat duct blockage.

These simple measures can ease discomfort and speed up recovery.

Preparing for Your Appointment

A medical visit is usually not necessary for mild heat rash. However, if the rash becomes severe, persistent, or you’re unsure about the cause, it’s best to consult a primary care doctor or dermatologist.

Before your appointment, prepare a list of questions you might want to ask, such as:

• What could have caused this rash?

• How can I treat it?

• Do I need to limit physical activity until the rash clears?

• How can I prevent heat rash in the future?

By understanding your condition and how to manage it, you can reduce discomfort and prevent future episodes of heat rash.