Heat rash is prickly heat, the difference between eczema and prickly heat mainly includes the cause of the disease, onset of the season, the onset of the site and symptoms and so on. 1. Different causes: The causes of eczema are more complex, such as menstrual disorders, stress, sun exposure, malnutrition, etc. may trigger eczema. Prickly heat is caused by high temperature and high humidity, which leads to the blockage of small sweat glands. 2. Different onset seasons: the onset of eczema is not seasonal, while prickly heat occurs in summer. 3. Different parts of the body: Eczema can occur in any part of the body, and is more likely to occur on the exposed parts of the body such as the face, ears, hands, feet, forearms, and lower legs. Prickly heat usually occurs in the neck, shoulder, chest, armpit, elbow and so on. 4. Different symptoms: eczema is an inflammatory skin disease of the epidermis and the superficial dermis, clinically acute lesions are mainly herpes papules, with a tendency to ooze, and the chronic phase is mainly mossy, easy to recur. Prickly heat is a superficial, inflammatory skin disease, manifested as small papules and blisters, itchy and prickly sensation, surrounded by a red halo. If you feel unwell, you should go to the hospital in time, improve the examination to clarify the cause of the disease, and then standardize the treatment under the guidance of the doctor, so as not to delay the condition.