The symptoms of eczema are mainly rash with itching, which can be divided into acute, subacute and chronic according to the course and clinical characteristics of eczema, and the specific clinical manifestations of different eczema will be different. The lesions of acute eczema show polymorphic changes, including erythema, papules, and even blisters, exudation and erosion. It is characterized by being distributed in exposed parts such as face, ears, hands and feet, forearms and calves. In severe cases, it can also diffuse all over the body, mostly symmetrically distributed. On the basis of erythema, papules and papules with the size of needle tip to sharp thorn appear, and in severe cases, blisters often merge into pieces with unclear boundaries. After scratching, it will form punctate erosion, with obvious liquid oozing and a strong itching feeling. Subacute eczema mainly occurs after acute eczema is relieved or treated improperly. The symptoms are redness, swelling and exudation, but there will be papules, papules, dark red skin lesions with scales, mild infiltration and severe itching. Chronic eczema is caused by acute eczema and subacute eczema, and may also be caused by mild irritation. From the beginning, it was a manifestation of chronic eczema. It is also manifested in the hands, feet, calves, elbow fossa, thighs, armpits, vulva and other parts with more wrinkles, dampness and sweating. It is characterized by infiltrating hypertrophic plaques with papules, scratches and scales on the surface. In severe cases, there will be different degrees of skin lichenization, which may be accompanied by pigmentation or hypopigmentation. Self-conscious symptoms are also itching, and the condition is repeated, showing a chronic and protracted process.