Eczema and heat rash are two different diseases, which can be distinguished from each other in terms of etiology, lesion characteristics, hairy parts and treatment principles. 1. Etiology: eczema can be caused by a variety of factors inside and outside the joint action of the symptoms, and autoimmune has a certain relationship, belongs to a kind of allergic skin diseases; and prickly heat is mostly caused by the blockage of the sweat ducts, usually occurs in summer, due to the environment of the stifling heat, a large number of sweat discharged obstacles caused by. 2. Clinical manifestations: the clinical manifestations of eczema are polymorphic, such as skin erythema, papules or pimples, with oozing in the acute stage, mossy changes in the chronic stage, and obvious itching; prickly heat is manifested as pinprick or corn-sized papules and blisters, which may be accompanied by itching discomfort. 3. Characteristics: Eczema can be diffuse all over the body, often symmetrically distributed; while prickly heat occurs on the trunk and skin folds. 4. Treatment principle: Eczema is mainly treated with antihistamines, such as loratadine, or with glucocorticoid topical or localized capsules. And prickly heat can be used glycerin lotion, prickly heat powder and hormone ointment and other external use, if the itching is obvious available antihistamines. It is recommended to go to the regular hospital in time, under the guidance of specialized doctors to standardize the treatment, to avoid blindly use their own medication to avoid adverse consequences.