The tail end of summer is almost out of sight, but we still have some palpitations about the heat of summer. Because summer is the season of skin diseases proliferate, the slightest carelessness may appear, especially heat rash and eczema. This is not only a fearful two diseases, the key is that they are also not easy to distinguish, and even because of improper use of medication, and increase the symptoms. So how do you distinguish between eczema and heat rash? We can start from the following aspects: First, the cause is different, “prickly heat” is mainly due to the heat of the weather, sweat can not evaporate in a timely manner and caused. “Eczema” is usually caused by a combination of internal and external factors. Internal factors such as chronic digestive system diseases, mental stress, insomnia, excessive fatigue, emotional changes, endocrine disorders, infections, slow metabolism, etc.; external factors such as living environment, climate change, food, etc. may cause eczema. The location of the growth is not the same, “prickly heat” is mainly in the fatty parts, while “eczema” will grow in any part, regardless of the thickness of the fat. The location is different, prickly heat appears in the neck, chest and back, elbow fossa, popliteal fossa and other parts, children can occur in the head, forehead and other sweaty parts. Eczema can occur in any part of the body, mostly in the cheeks, forehead, arch of the eyebrows, behind the ears and other parts. The degree of itching, “prickly heat” itching degree is general, while “eczema” acute is extremely itchy. Five, the occurrence of different seasons, prickly heat occurs in the summer, mostly seen in children. Eczema, on the other hand, is not seasonal and can occur all year round, regardless of gender and age. But often in the winter recurrence or intensification, there is a tendency to exude, chronic course, easy to recur. The extent of the lesions is different, “prickly heat” is not large, the distribution is not regular, while “eczema” affects a wide range of scratching, there are obvious point-like exudation, mostly symmetrical distribution, will be a large area of peeling, rotting. Seven, the symptoms are different, prickly heat, generally on the skin is a pinhead-sized red papules, dense into patches. Eczema is initially erythematous, later small dotted papules, herpes, very itchy, herpes broken, exudate outflow, dry to form a scab. The situation is different, “prickly heat” is generally not repeated, easier to get when young, while “eczema” is prone to recurrence, with the usual diet and rest related.