Itchy red rashes on the neck when you sweat may be related to heat rash, ringworm, eczema and other causes.
1. Heat rash: hot weather leads to a lot of sweating at the neck, if some sweat can not be discharged in time, it can accumulate in the human skin, there may be an inflammatory reaction, manifested as pimples, often accompanied by itching.
2. Ringworm: hot weather leads to a lot of sweat at the neck, may be infected with fungi, appearing red rash, accompanied by itching.
3. Eczema: under the stimulating effect of sweat, it can cause inflammation of the superficial dermis and epidermis, which can be manifested as pimples and papules, and can be accompanied by redness, swelling and itching.
It is recommended that the neck of a sweat itchy red rash in time to go to the hospital, clear cause, under the guidance of the doctor for standardized treatment.