According to the course of disease and the characteristics of skin lesions, it is generally divided into acute, subacute and chronic categories.

(1) acute wet sore

The onset is rapid, often symmetrical, and can occur in any part of the body or the whole body, but it is more common in the forehead, eyelids, cheeks, ears and lips. At first, the skin is red, swollen and itchy, and then papules, papules and blisters appear on the red, swollen or surrounding skin. Skin lesions are clustered or dense, with different shapes and sizes and unclear boundaries. Blisters often rupture due to scratching, forming erosion, bleeding and scabbing. Conscious itching, mild itching, severe itching with intermittent or paroxysmal attacks, often aggravated at night, affecting sleep. Those who have extensive skin damage may have systemic symptoms, such as fever, constipation and short and red urine.

(II) Subacute wet sores

Most of them are caused by acute wet sores. In acute stage, redness, blisters and bleeding decreased, but erythema, papules and desquamation still existed. Conscious itching, light or heavy, generally no general discomfort.

(iii) Chronic wet sores

Most of them come from acute and subacute wet sores, or chronic wet sores, characterized by skin thickening, rough surface, obvious dermatoglyphics or mossy changes, hard texture, dark red or purple brown, often accompanied by a small amount of scratches, crusts, scales and pigmentation, and occasional erosion and bleeding. I feel itchy, especially when I eat spicy and fishy products at night. If it happens in the palms, feet and joints, it is easy to crack and cause pain. The course of the disease is long, ranging from several months to several years, often accompanied by dizziness, backache, limb weakness and other systemic symptoms.

(1) Wet sores on the head and face are mostly erosive, watery and thick yellow knots, and sometimes the hair sticks into bundles, which often leads to alopecia due to poisoning. Hair on the face, mostly reddish patches, covered with thin scales.

(2) Wet sores on the ear are prone to occur in the ear fossa, behind the ear fold and in front of the ear. Skin lesions are flushing, erosion, rash, scabbing, chapped ears, such as knife cutting, itching without pain, symmetrical occurrence.

(3) Wet sores of the breast mainly occur in women, showing flushing, erosion, bleeding, covered with scales or yellow scabs. Self-conscious itching, or pain caused by chapped.

(4) Umbilical wet sore skin lesions are bright red or dark red patches with pus and scab, clear boundaries and normal skin around them. Often the smell is unpleasant, and it is easy to be infected with poisons, with redness, swelling, heat and pain, accompanied by fever, chills, constipation, drowning and other symptoms.

(5) There are many forms of skin lesions of hand wet sores, including flushing, erosion, rash and scab. Repeated attacks can lead to rough and thick skin. In winter, chapped skin often causes pain. The hair on the back of the hand is mostly coin-shaped; The hair is in the palm of your hand, and the edge of the lesion is not clear.

(6) Wet sores on the lower leg are more common in people who stand for a long time, and skin lesions mainly occur in the medial and lateral sides of13 under the leg. Local blue veins are often exposed first, followed by dark erythema, and the surface is wet, erosive, fluid or dry, crusted and delaminated, showing localized or diffuse distribution. Often accompanied by false sores. The course of the disease is prolonged and recurrent, and the skin can be thick and rough, with pigmentation or decline.

(7) Wet sores of scrotum mostly occur in scrotum, sometimes extend around anus, and a few involve penis. ; Flushing, swelling, erosion, exudation and scabbing in acute stage; In the chronic stage, the skin is thick and rough, wrinkles deepen, pigmentation, a small amount of scales, often accompanied by mild erosion and exudation. The course of the disease is long, and it will not heal for months or years.

(8) Children's wet sores mostly occur in the head and face, especially in the face. On the face, it is a cluster or scattered erythema or papule at first. On the scalp or eyebrows, there are greasy scales and yellow scabs. In light cases, there are only reddish patches, accompanied by a small amount of scales, and in severe cases, erythema, blisters and erosion appear, which are soaked into pieces and spread continuously. Consciously itching is serious, and children often have restless sleep and loss of appetite. Generally, it can recover after 1-2 years old. If you have recurrent attacks after 2 years old, it will not recover for a long time. People with family history and allergic history are called four winds.

(9) four winds is generally divided into infancy, childhood and adulthood. Skin lesions in infancy are multiform, including erythema, papules, blisters, erosion, bleeding, scabbing and desquamation. It occurs in the head, trunk and limbs. Childhood skin lesions are limited and symmetrical, mostly dry papules with scales, or mossy patches, with clear edges, scratches, exfoliation of epidermis and blood scab caused by scratching. A few papules can be rice grain to soybean size, normal skin color or brown, with large initial appearance, flushing color, long-term hardening and brown color. More common in elbow fossa, popliteal fossa or limb extension. Adult skin lesions are similar to disseminated psoriasis, and most of them are compact small papules, which often merge into pieces and become moss-like with thin scales on them. It usually occurs around the neck, limbs and eyes. Consciously severe itching. Some patients are accompanied by emaciation, loose stool, anorexia, mental fatigue, dizziness, backache, dysplasia and other symptoms. 1, contact dermatitis and acute wet sore. Have a clear history of contact. Skin lesions are limited to contact parts, mainly erythema, flushing, swelling and blisters, with simple shape and clear boundaries. After removing the cause, it will recover quickly and will not recur.

2. Psoriasis is different from chronic wet sore. Skin lesions often occur in the neck, limb extension and sacrococcygeal region. At first, it was a polygonal flat papule, and later it merged into pieces. The typical lesion is lichenoid transformation with clear boundary and no history of erosion and exudation.