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What is prickly heat rash & miliaria?
Dec 21, 2023 · 6 min read. What Is Heat Rash? A heat rash is a common rash on the skin that can show up when you're hot or you sweat a lot. It can make parts of your skin feel prickly or sting due to...
- What is prickly heat?
- Symptoms of prickly heat
- Causes and triggers
- Prickly heat on a baby
- How to calm the itchy or prickly feeling
- Over-the-counter (OTC) products
- Prevention tips
- Outlook for prickly heat
The condition that we call prickly heat happens to adults and children when sweat becomes trapped under the skin.
It’s also called heat rash, sweat rash, or miliaria rubra. Children tend to get it more than adults because their sweat glands are still developing.
The symptoms of prickly heat are fairly straightforward. Red bumps and itching occur in an area where sweat has been trapped underneath layers of skin.
The neck, shoulders, and chest are the most common places for prickly heat to appear. Folds of skin and places where your clothing rubs against your skin are also areas where prickly heat might occur.
The area of irritation might display a reaction right away, or it might take a few days to develop on your skin.
Sometimes prickly heat will take the form of a patch of very small blisters. This is your skin reacting to the sweat that’s leaked between its layers. Other times the area of your body where sweat is trapped might appear swollen or itch persistently.
Hot weather, particularly alongside humidity, is the most common trigger for prickly heat rash. Your body makes sweat to cool down your skin.
When you sweat more than usual, your glands can become overwhelmed. The sweat ducts may become blocked, trapping the sweat deep underneath your skin. The sweat may also leak through layers of your skin close to the epidermis, or top layer, and become trapped there.
Children, especially infants, are especially vulnerable to prickly heat. Their sweat glands aren’t yet fully developed, and their skin isn’t used to rapidly changing temperatures.
Infants tend to experience prickly heat on their face and in the folds of their skin around the neck and groin.
Like most baby rashes, prickly heat is usually harmless and will go away on its own. Your baby might act cranky and be difficult to soothe while they’re experiencing the itchy sensation of heat rash.
If you notice a small patch of tiny red blisters beneath your child’s skin, evaluate their surroundings. Are they wearing too many layers? Is their clothing appropriate for the temperature?
Is your baby acting restless, and does their urine indicate they could be dehydrated? A cool bath will provide relief for your child in most situations. Keep their skin dry when it’s not bath time. Avoid oil-based products, as they could clog the pores further.
If your baby displays a fever over 100.4°F (38°C) or other symptoms, call their pediatrician.
Heat rash, including prickly heat, will often go away without treatment.
The first step to soothing prickly heat is to move away from the irritant (or environment) that’s causing your skin to break out in a sweat. Once you’re in a cooler environment, the sensation of itching underneath your skin might take a while to subside.
Other remedies for prickly heat include:
•wearing light, loose-fitting clothing
•avoiding skin products that contain petroleum or mineral oil
•avoiding perfumed soaps or body care products
Calamine lotion is a natural remedy for prickly heat. It can be applied to the affected area to cool the skin.
Other products to try include:
•OTC corticosteroids, such as hydrocortisone cream in a low dosage
•anhydrous lanolin, a waxy ointment derived from wool
•topical or oral antihistamines to reduce itching
If pricky heat is associated with a fever, you may consider fever reducers such as ibuprofen (Advil, Motrin) or acetaminophen (Tylenol). Speak with a healthcare professional before giving one of these medications to a child.
The most effective way to avoid prickly heat is to stay away from situations that cause excessive sweating. Try these tips:
•Wear loose-fitting cotton clothing if you know you’re going to be in a hot or humid climate.
•Take cool baths or showers frequently if you’re visiting a hot or humid climate.
•If you’re in a hot or humid climate, spend a few hours each day in a cool space with fans or air conditioning.
•Opt for lightweight bedding, such as cotton or linen sheets.
•When you exercise outside, choose gear that’ll wick moisture away from your skin.
Heat rash usually goes away on its own. If the rash seems to be getting worse, or the area seems like it’s becoming infected, consider seeing a doctor.
Remember that bacteria live in your skin. Excessive itching can create an open wound that’ll grow infected as you continue to touch it.
Some people have hyperhidrosis, a condition in which their bodies produce too much sweat. If you suspect you’re sweating too much, you may want to see a dermatologist.
If you notice prickly heat appearing on your skin, be mindful of what your body is trying to tell you. Make sure to stay hydrated in warm climates and during physical activity.
May 31, 2022 · Health Conditions. Skin Health. Dermatology. Here’s How to Get Rid of Heat Rash, According to Dermatologists. Plus what those pesky bumps are, exactly. By Jessica Migala. Reviewed by Fatima...
Apr 11, 2024 · Print. Table of Contents. Symptoms. Finding Relief. Managing Heat Rash. When to Call a Provider. Prevention. Heat rash, also known as eccrine miliaria , sweat rash, and prickly heat, is a skin rash that causes the skin to turn red and feel warm or prickly (stinging).
- Lana Barhum
May 6, 2022 · Causes. Risk factors. Complications. Prevention. Overview. Heat rash — also known as prickly heat and miliaria — isn't just for babies. It affects adults, too, especially in hot, humid conditions. Heat rash occurs when sweat is trapped in the skin. Symptoms can range from small blisters to deep, inflamed lumps.
Oct 4, 2017 · Symptoms. Prickly heat commonly occurs in the neck, chest, shoulders, and face. Prickly heat is usually easy to identify due to its straightforward symptoms. Tiny red bumps and itching on...
May 2, 2024 · Self-Care Methods. OTC Medications. How Long Does a Heat Rash Last? When to Seek Medical Care. A heat rash (prickly heat or sweat rash) is a painful skin condition that itches and burns because the skin has gotten too hot. It appears as small, pink bumps on light skin tones and white bumps on dark skin tones.
