Eczema and prickly heat are relatively common skin diseases, easily confused with each other, improper treatment and delayed disease, can be identified from the onset of causes, the onset of the season, the onset of the site and other aspects: a. Causes 1, eczema: internal causes include abnormal immune function, nutritional disorders, chronic infection. External factors include allergens, irritants, microorganisms, environmental temperature, sun exposure, etc. In addition, psychosocial factors can induce eczema aggravation; 2, prickly heat: prickly heat more than due to the hot and muggy environment resulting in sweat can not evaporate in time, the keratin layer is impregnated with sweat swelling, resulting in sweat duct narrowing or blockage, resulting in sweat duct destruction and inflammation. Second, the onset of the season 1, eczema: all year round, but more common in winter and spring, the symptoms are easily aggravated; 2, prickly heat: mostly seen in the summer high heat season. The onset of the site 1, eczema: commonly occur in the face, ears, hands, feet, forearms, calves and other exposed parts, serious patients may diffuse the whole body, often symmetrical distribution; 2, prickly heat: commonly occur in sweat accumulation parts, such as the armpit, elbow fossa, neck, torso and other parts. Clinical manifestations 1, eczema: often manifested as erythema, on the basis of which will appear pinpoint to rice grain size papules, papules, etc., in serious cases will appear small blisters, can be fused into pieces; 2, prickly heat: can be in the sweat duct distribution dense arrangement of closely arranged pinpoint-like papules, superficial blisters or pustules, serious cases can develop into dermal inflammation, patients may also appear headache, dizziness, fever and other systemic symptoms. V. Course of disease 1, eczema: long course, divided into acute, subacute and chronic, short days, long years, acute eczema for a long time will turn into chronic eczema, it is more difficult to cure, to eliminate symptoms and reduce recurrence; 2, prickly heat: usually disappears quickly after cooling, dry treatment, topical drugs to cool, astringent, antipruritic principle.