Itchy small bumps on the neck due to hot weather

The neck usually refers to the cervical region. The appearance of small, itchy bumps on the neck during hot weather may be caused by conditions such as miliaria (heat rash), urticaria, or folliculitis. It is recommended to relieve symptoms through medications, physical therapies, and other treatments. Specific analyses are as follows:

1. Miliaria (Heat Rash)

Environmental factors—such as hot, dry weather and strong ultraviolet radiation—may induce inflammation, activate macrophages, and trigger the release of inflammatory mediators. This can result in dense, millet-sized papules, papulovesicles, or small blisters on the neck, accompanied by itching. Medications such as cetirizine hydrochloride tablets or mometasone furoate ointment may be used under medical guidance.

2. Urticaria

This condition may arise from prolonged exposure to allergens, inhalation of irritants, or endocrine dysfunction within the body, leading to the development of small, itchy bumps on the neck. Treatment may involve medications such as omalizumab injection under a doctor's supervision, along with oral antihistamines like levocetirizine capsules.

3. Folliculitis

This may result from bacterial infection due to improper skin care or from blocked hair follicles. Clinical examination typically reveals symptoms including papules, itching, and redness and swelling, causing small, itchy bumps on the neck. Treatment options include topical application of metronidazole gel or fusidic acid cream under medical supervision. Additionally, physical therapies such as ultrashort wave therapy may help alleviate symptoms.

Besides the above-mentioned causes, similar symptoms may also be triggered by contact dermatitis, eczema, or milia. It is advisable to seek medical attention early and avoid self-medication.