Health tips: eczema is a very common skin disease, so what is the classification of eczema? What are their respective symptoms? Let's talk about this problem. Eczema is divided into three stages: acute, subacute and chronic. Acute and chronic eczema have obvious characteristics. Subacute stage is usually the process of remission in acute stage or the performance of transition to chronic stage.
1. Acute eczema
The manifestations were primary and pleomorphic rashes. On the basis of erythema, there are papules and herpes of the size of needle to miliary. In severe cases, there are small blisters, which often fuse into tablets, and the boundary is not clear. In the periphery of the lesion, the pleomorphic rash was gradually sparse. Severe pruritus, often due to scratch the skin rash erosion surface, and serous exudation and scab. If accompanied by secondary infection can form pustules, pus and pus callus, the corresponding lymph nodes can be enlarged. Severe infection can be accompanied by fever and other systemic symptoms.
The distribution of acute eczema is often symmetrical. It is often seen in the exposed parts such as face, ear, hand, foot, forearm and leg. When it is serious, it can expand the whole body. The self-conscious symptoms include severe itching and burning sensation, which may aggravate intermittently, especially at night, affecting sleep and work. Some patients have purulent infection foci with skin damage or insect bite. The bacterial toxins and tissue decomposition products in the purulent exudate are coated on the surrounding skin, causing pleomorphic damage such as erythema, papules, papules, blisters and pustules around the wound, and gradually expanding outward. If not treated in time, erythema, papules and blister damage and pruritus can occur in remote parts Severe itching, known as infectious eczematoid dermatitis (eczematoid dermatitis), its skin lesions are red, swollen and exudative, and develop rapidly. It looks like acute eczema, but it has more pus. The course of chronic attack is usually 2-2 weeks, and it can be treated repeatedly.
2. Subacute eczema
A small amount of erythema and papule exudation can be alleviated in subacute stage. Blisters and erosion gradually healed, there may be scales, itching and the condition gradually improved. Some may develop into chronic eczema due to re exposure to allergens, new stimulation or improper treatment and excessive scratching.
3. Chronic eczema
Often from acute and subacute phase, or from the beginning of inflammation is not very serious, there are scattered erythema and papules or scratch caused by skin itching. For a long time, the skin of the affected area is hypertrophic, rough, mossy, with pigmentation or partial hypopigmentation area and scales, which can be mild or severe, lasting for several months or more.
Chronic eczema occurs in the hands, feet, legs, cubital fossa, thigh, breast, vulva and anus, etc. Due to different parts of the disease, the performance is different.
① Hand eczema
There are more opportunities for exposure to various stimuli. Frequent activities, so the incidence rate is high. Most of them have a slow onset, with dark red plaques on the back of hands and fingers, obvious infiltration and hypertrophy, clear edge, dry and rough surface, with a diameter of 1-2 to several centimeters or more. Cracks are often found in winter, and similar damage is often found in the heel of feet. If it is induced by tinea pedis, it is eczematous lesion of tinea pedis.
② Elbow eczema
Common in the elbow flexion or extension, symmetrical distribution, clear edge plaque. The lesions are thick and dry, covered with a few scales, and may be slightly lichenoid. In case of stimulation can be acute attack. Breast eczema is more common in lactating women, nipple and areola and under the breast are dark erythema, papules and herpes, the boundary is not clear, may be accompanied by erosion. Exudation and cracks, itching obvious, can be side or symmetrical, easy to heal after stopping breastfeeding.
③ Eczema of vulva, scrotum and anus
Severe pruritus, often due to excessive scratching, hot water scalding and redness, exudation and erosion, chronic lichen like change.
④ Crural eczema, especially chronic eczema in the lower medial part of the leg, is often secondary to varicose veins. At the beginning of dark erythema, the boundary is not clear, followed by small papules, herpes, easy to exudate, erosion and ulcer. For a long time, the skin is obviously thickened, sclerotic, with pigmentation. In severe cases, it can induce self allergic dermatitis. In limbs, trunk, face and other remote parts, most scattered or clustered small papules and papules appear symmetrically. Sometimes the skin lesions are distributed and arranged like pityriasis rosea, with severe pruritus, swelling of superficial lymph nodes, low fever and general discomfort. After the improvement of the primary lesion, the self allergic dermatitis can gradually subside.
In addition, there are some characteristic types
① Numismatic eczema
The lesions consisted of round or quasi round coin like plaques with dense papules and herpes, with a clear boundary and a diameter of about 1-3cm. When it is acute, the skin is flushed and exudates. When it becomes chronic, the skin lesions are hypertrophic, the pigment increases, the surface is covered with dry scales, and the skin itches consciously. It often occurs in the limbs.
② Porphyryx
The rash is the size of millet to mung bean, deep in the hemispherical blister. The wall of the blister is tense and thick, the blister fluid is clear, the surrounding skin color is normal, or slightly red, and often appears in batches, with itching feeling. The course of the disease is generally 2-3 weeks. After it subsides, it leaves neckline like desquamation. If there is secondary infection, the blister fluid is turbid, and pustules can be formed. Local swelling and pain are obvious, and the corresponding lymph nodes are swollen. The disease often occurs in spring and autumn. In the past, it was called sweat herpes, which had nothing to do with sweat ducts and sweat glands in essence. It may be an eczema like reaction.