Sunburns Vs. Heat Rashes

Different seasons bring different Skin Problems, now that the summers are here we need to be extra protective for our skin. When heat waves strike, your skin becomes the first victim. Whether it’s the stinging pain of a Sunburn or the itchy irritation of a Heat Rash, both conditions can make even the best summer plans feel like a disaster. We are in 2025 and many people still don’t understand the difference between heat rash and sunburn. Understanding the difference between Sunburns and Heat Rashes is the first job and treating them effectively is the second. Dr. Zainab Safderi, one of the Top 5 Dermatologists in Indore will guide you with the difference and treatment options for Sunburn and Heat Rashes. 

What is a Sunburn?

Sunburn is your skin’s way of crying out after excessive exposure to Ultraviolet Radiation (UV Rays) from the sun. It typically develops a few hours after being outdoors without proper sun protection. The skin turns red, becomes warm to the touch and feels tender or painful. In more severe cases, sunburn can cause swelling, blistering and even peeling after a few days.

What are Heat Rashes?

Heat rash also known as Prickly Heat or Miliaria occurs when sweat gets trapped beneath your skin. This typically happens in hot and humid weather when your sweat glands become clogged. These are the tiny, red and itchy bumps on your skin that may feel prickly or even painful. Heat rash is especially common in areas where skin folds or where tight clothing prevents proper ventilation like underarms, neck, back or thighs.

Difference between Heat Rashes and Sunburns-

1. Causes- 

Heat Rashes are caused by blocked sweat glands that trap sweat under the skin. Whereas, sunburns are caused by overexposure to UV Rays from the sun. 

2. Triggered- 

Heat Rashes can be triggered through excessive sweating, hot and humid weather. While, sunburns can be triggered by staying in the sun for too long without the skin protection. 

3. Appearance- 

Heat Rashes are small, red and pink bumps or blisters on the skin which sometimes may feel itchy. Whereas, sunburns make the skin appear red and inflamed. Sunburns may feel painful, warm and tender. 

4. Duration- 

Heat Rashes will require around 1-3 days for resolving whereas sunburns may take several days or even a week to heal, depending upon the severity. 

5. Location- 

Heat Rashes commonly appear on the skin folds such as neck, underarms, back, chest or thighs. Whereas, sunburns will appear on any sun-exposed area such as face, arms, shoulder, back etc.

Common Treatment Options for Sunburns and Heat Rashes- 

1. Stay Hydrated- Drinking plenty of water keeps your skin hydrated and helps regulate your body temperature, reducing the risk of overheating and excessive sweating.

2. Apply Sunscreen-  Even if you are planning to stay in the shade or indoors for part of the day, use a broad-spectrum sunscreen with at least SPF 30 to protect your skin from harmful Ultraviolet Radiations that can trigger sunburn.

3. Wear Breathable Clothing- During the summer season, opt for natural fabrics like cotton or linen. Loose clothing allows air circulation, helping to keep your skin cool and reducing sweat buildup that can cause heat rashes and worsen sunburn discomfort.

4. Maintain Good Hygiene- Keeping your skin clean by showering after sweating helps remove excess oil and sweat, which can clog pores and lead to heat rashes. By using a gentle cleanser you can keep your skin fresh, without stripping its natural moisture.

Conclusion

Though heat rash and sunburn may appear similar at a glance, understanding the differences between the two is crucial for effective treatment and prevention. If you are the one who is suffering from any of these symptoms then do not ignore the signs and book your appointment with Dr. Zainab Safderi, Skin Specialist for the best medical guidance.