Heat rash in infants

Heat rash (prickly heat) in infants

Prickly heat, or heat rash, is a small red rash that appears on an infant's skin due to overheating. It is a very common condition, especially in warm weather or if the baby is overbundled. It is not dangerous and usually resolves on its own once the cause of overheating is removed.

Why does prickly heat occur?

The infant's thermoregulatory system is still immature, and its sweat glands and ducts are very narrow. When the baby gets hot, it begins to sweat. If too much sweat is produced, or its evaporation is hindered by tight clothing, the sweat ducts can become blocked. Sweat that cannot reach the surface accumulates under the skin, causing irritation and the appearance of tiny red papules or blisters.

Prickly heat most commonly appears in natural skin folds and where the skin sweats the most:

• Neck
• Armpits
• Groin area
• Upper back and chest

How to differentiate from other rashes?

Prickly heat usually does not cause the baby significant discomfort, aside from mild itching. It differs from eczema in that the skin under the rash is not dry and rough. Unlike allergic rash, prickly heat is not associated with the introduction of new products. Different types of rashes are described in detail in our blog "Rash in infants".

Prevention and care

The best remedy for prickly heat is coolness and fresh air. Dress the baby in lightweight clothing made of natural fabrics, keep the room at a comfortable temperature (18-22°C), and give frequent air baths. Bathing in warm water, possibly with added chamomile tea, helps soothe the skin. It is important to remember that overheating is a risk factor for sudden infant death syndrome, so proper temperature control is part of safe sleep.