The differences between prickly heat and eczema are usually the different onset seasons, different locations of lesions, different prognosis and different clinical manifestations. 1. Different onset seasons: Prickly heat usually occurs in summer when the temperature and humidity are high, while eczema can occur throughout the year. 2. Different parts of lesions: Prickly heat usually occurs in sweat gland-rich areas, such as the scalp, the front of the neck, the elbow socket, etc., while eczema can occur in any part of the body, and the more common parts are usually the hands, legs and ears. 3. Different prognosis: as the temperature drops, prickly heat may be relieved or disappear on its own, while eczema can only be relieved after active treatment. 4. Different clinical manifestations: Prickly heat rash mainly consists of small pimples and blisters, with a single pattern of rash, while eczema has multiple patterns of rash, which include scabs, scales, scratches and thickening of the skin in addition to pimples and blisters. Patients who have prickly heat and eczema should consult a doctor in a timely manner and under the guidance of a professional doctor to avoid delaying the condition.