Itchy and red rashes in hot weather may be cholinergic urticaria, prickly heat, eczema or insect bite dermatitis.
1. Cholinergic urticaria: Cholinergic urticaria can be triggered by factors such as overheating or various sports, hot baths, sudden emotional excitement, and eating hot drinks.
Due to various reasons, the body temperature rises, which stimulates the thermoregulatory center of the brain and excites the cholinergic nerves to release acetylcholine, which then causes the mast cells and basophils to release histamine and allergic reactions occur. At this time, you can use anti-allergy medicine treatment, you can also use glycerite lotion and other anti-itch lotion.
2. Prickly heat: the temperature change is too large, causing rapid contraction of the pores, so that the sweat discharge obstacles occur, can occur in the head, armpits, neck, thigh roots and other parts of the sweat is not easy to evaporate, the performance of small pimples and small blisters. You can use glycerin lotion externally, and apply mupirocin ointment locally when combined with infection.
3. Eczema: It may be the change of temperature, which stimulates the local skin and causes eczema. Generally, eczema initially presents polymorphic rash, erythema, and then appear millet-like size of papules, papules, blisters, broken can have oozing, vesicles. The patient’s skin lesions may appear itching, swelling and other symptoms.
4. There may also be insect bite dermatitis: mosquitoes are more active in summer, if the skin is more sensitive, after being bitten by mosquitoes, the skin is also prone to allergic reactions. At this time, you can take oral cyproheptadine, vitamin C and other drugs, can also be used externally with glycerite lotion or cyproheptadine ointment.
Pay attention to the hot weather, itchy body, red rash, it is recommended to go to the hospital, follow the doctor’s instructions for treatment, avoid unauthorized use of drugs.