The main difference between baby eczema and prickly heat is that the causes and manifestations are different. Eczema is related to many factors such as heredity and environment, while prickly heat is caused by poor excretion in the sweat ducts, and the manifestations and distributions of the diseases are also different. 1. Difference in etiology: infantile eczema is an allergic skin disease caused by genetic, environmental and other internal and external factors, prickly heat is caused by hot and humid environment with a lot of sweating, sweat ducts in the sweat can not be discharged in a timely manner, can only penetrate into the surrounding tissues, resulting in inflammation of the skin. 2. Performance difference: baby eczema can be distributed in any part of the body, manifested as symmetrical erythema, papules, papules, blisters, oozing and other morphology of the rash, prickly heat is generally long in the sweaty parts of the body, such as the scalp, forehead, chest wall, back, there are white prickly heat, red prickly heat, pus prickly heat, prickly heat, with a uniform morphology of the pimples, papules, blisters for the performance. If the baby has eczema or prickly heat, consult a doctor for a clear diagnosis of the cause of the disease and guidance on the treatment method, and do not take any action without authorization, so as not to cause adverse consequences.