Eczema and heat rash can be differentiated in terms of onset cause, age of onset, season of onset and treatment. 1. Causes: The occurrence of eczema is related to diet, environment, infection, heredity and other factors. The cause of heat rash is related to humid environment. If you are often in a hot and humid environment, heat rash may appear on your skin. 2. Age of onset: Eczema can occur at any age, there is no age limit. However, heat rash usually occurs in infants and children, and is less common in adults. 3. Season of onset: Eczema is not seasonal and can occur throughout the year. Heat rash, on the other hand, usually occurs in the hot summer months. 4. Treatment: Eczema is usually treated with antihistamines, such as loratadine and cetirizine. The treatment of heat rash is mainly based on topical medications, such as prickly heat powder and glycerite lotion applied externally, with antihistamines such as ipratropium and cetirizine hydrochloride, if necessary, to relieve itching. Itchy skin or red rash, it is recommended to pay attention to skin care, avoid scratching and stimulation, but also out of the environment, if necessary, to the hospital dermatology department, follow the doctor’s instructions for treatment, do not self-medication.