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How to protect your skin from brutal summer heat rash

Don't let blocked sweat ducts ruin your mango season. Here is the 101 on keeping your skin breathing when the Delhi humidity hits 100%.

As a dermatologist practising in Delhi for over 15 years, I have come to recognise summer not just by the blazing heat or the arrival of mangoes, but by the sudden surge of patients walking into my clinic with red, itchy, and prickly skin. 

Heat rash, or miliaria, is one of the most common yet often misunderstood conditions. What begins as mild irritation can quickly disrupt sleep, confidence, and daily routines if not handled correctly.

I still remember a young college student who visited my clinic last June. She was preparing for her entrance exams and spent long hours in a poorly ventilated room with her books. The combination of extreme Delhi heat, humidity, and sweat trapped under her clothes led to clusters of itchy red bumps across her neck, chest, and upper back. Like many others, she thought it was an allergy and applied thick creams recommended by well-meaning friends. Within days, the condition worsened. The heavy creams had further blocked her sweat ducts, turning a simple heat rash into an angry, uncomfortable eruption. A proper examination and the right advice helped her recover in a week, but her story is repeated across the city countless times every summer.

Just last week, a 38-year-old tech professional came in with a severe presentation. Because of daily metro ride and tight formal shirts, he had developed painful, deep-seated nodules in his armpits and groin. He admitted he often ignored the itching and continued wearing synthetic clothes. His case reminded me how heat rash does not spare any age group or profession—from toddlers to C-suites, it affects us all when sweat has nowhere to go.

Understanding heat rash 

Heat rash occurs........

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