Why do my legs itch when it gets hot in summer?

Itching on the legs when it gets hot in summer may be caused by dry skin, contact dermatitis, eczema, insect bite dermatitis, miliaria (heat rash), or other reasons. It is recommended to visit a hospital for diagnosis to determine the exact cause.

1. Dry Skin

Frequent bathing during summer can remove the skin's natural protective oils, leading to dryness. This may cause itching when sweating. Symptoms can be improved by reducing bathing frequency and appropriately maintaining skin moisture.

2. Contact Dermatitis

Individuals with allergic constitutions may develop immune responses when exposed to allergens in summer, such as pollen or sunlight, which irritate the skin. This can lead to itching, redness, and swelling. Under medical guidance, antihistamine medications such as chlorpheniramine maleate tablets, loratadine tablets, or cetirizine hydrochloride tablets may be used to suppress histamine release, alleviate allergic symptoms, and promote recovery.

3. Eczema

In summer, strong ultraviolet (UV) radiation may trigger local allergic reactions in the skin, resulting in itching and small red papules. Treatment may include topical application of prescription creams such as mometasone furoate cream, halometasone cream, or desonide cream under a doctor’s supervision to reduce inflammation and support healing.

4. Insect Bite Dermatitis

Summer is a season with high insect activity. Bites from mosquitoes, ticks, or other insects may introduce toxins that trigger local inflammatory reactions, causing redness and itching. As directed by a physician, calamine lotion or 3% boric acid solution can be applied locally to soothe the skin, reduce inflammation, and aid recovery.

5. Miliaria (Heat Rash)

High temperatures in summer can lead to excessive sweating that does not evaporate easily. Sweat may accumulate and swell within the stratum corneum, blocking or narrowing sweat ducts, resulting in itching and small red papular rashes. With medical advice, cooling and anti-itch medications such as compound menthol salicylate liniment, calamine lotion, or talcum powder for prickly heat can be used to protect the skin, relieve itching, and promote recovery.

It is advisable to promptly visit a hospital for appropriate examinations to identify the underlying cause and receive proper treatment to alleviate discomfort.