May 24, 2025

Aarushi Bhadury

Do You Have Prickly Heat Rash – Symptoms, Causes And Treatment

​What is Prickly Heat Rash​

Heat rash forms when sweat gets stuck under your skin's surface. This leads to small, itchy bumps and an uncomfortable feeling.

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​Types of Prickly Heat Rash ​

Miliaria crystallina is mild with tiny, clear blisters near the surface. Miliaria rubra, or prickly heat, causes red, itchy bumps from deeper sweat. Miliaria profunda is the most severe, occurring when sweat leaks even deeper after repeated rashes.

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​Key symptoms of Prickly Heat Rash ​

Miliaria rubra shows up as itchy bumps, 2 to 4 millimeters in size. They appear pink or red on lighter skin, and gray or white on darker skin.

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​Where Does Prickly Heat Rash Appears?​

These bumps often show in skin folds and where clothes rub. Common spots include the chest, back, arms, and legs.

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​Timing ​

The rash might appear immediately after irritation. Sometimes, it can take a few days to develop fully on your skin.

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​Other Forms of Prickly Heat Rash​

Prickly heat can also look like tiny blisters, meaning sweat has leaked between skin layers. The affected area might swell or itch constantly.

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​When to see a doctor ​

You usually don't need a doctor for heat rash. However, see one if you notice pus-filled bumps, as this might indicate a bacterial infection.

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​Why it happens ​

Heat rashes are caused by trapped sweat. This can result from hot, humid weather, long exercise, fever, or wearing clothes that don't let sweat evaporate.

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​How sweat gets trapped ​

When you sweat heavily, sweat glands get overwhelmed. The tiny tubes carrying sweat get blocked, trapping sweat under your skin layers.

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​Seasonal and travel factors ​

While heat rash can occur anytime, it's most common in warmer months. People from cooler places often get it when visiting hot, humid tropical areas.

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​Self-care ​

Heat rash often goes away on its own. Move away from the heat source. In a cooler room, the itching sensation should gradually subside.

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​Home remedies and clothing ​

Wear light, loose cotton clothing, avoiding synthetics. Don't use skin products with petroleum or mineral oil, or perfumed soaps. A cold compress can also help.

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Thanks For Reading !

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