nummular eczema
Introduction
Introduction to Coin-type Eczema Coin-like eczema (nummulareczema), also known as nummulareczematousdermatitis or discoid eczema (discoideczema), this disease is similar to traditional Chinese medicine, such as "the source of the disease" wet case records: "wet sputum, There are also Guo, such as insects, soaked, also wet itchy, succulent into sores, is its wind, gas is shallow, wet and windy, so it is wet. The cause is the same as eczema. basic knowledge The proportion of sickness: 0.2% Susceptible people: no specific population Mode of infection: non-infectious Complications: pruritus
Cause
Coin-like eczema cause
(1) Causes of the disease
Not yet clear, but many factors play a single or complex role.
(two) pathogenesis
Staphylococcal or other microorganisms are found on the surface of active lesions of the patient. Therefore, it has been suggested whether the bacteria are allergic to the bacteria or the infection itself. Even people who use Staphylococcus aureus or Micrococcus as antigens are positive for the intradermal injection test. However, it has not been fully verified by experimental research. In addition, if some metal substances, wool, soap, etc. are exposed, the condition is aggravated. It is suggested that the increase in winter incidence is related to dry skin, while the patients who are aggravated in summer are related to heat and humidity. Can also affect the aggravation of the disease.
Prevention
Coin-type eczema prevention
The disease occurs in the summer, and there are multiple allergies. The incidence of infants and young children is higher than that of adults.
1. Remove the cause
(1) Although the cause of eczema is not easy to be clear, we should still ask for a detailed history, conduct necessary systematic examinations, try to find possible causes and remove them.
(2) People with allergies should avoid physical contact with substances that are allergic to them (see sensitizers in the cause) in addition to clothing, food, shelter, etc., as well as physical exercise to improve allergies.
2. Early diagnosis
Early treatment according to eczema clinical itching severe, pleomorphic damage, oozing tendency, good limbs flexion and easy recurrence characteristics, easy to diagnose, densely distributed red papules, herpes simplex with severe itching, early treatment, Since most of the early eczema belongs to the acute phase or the subacute phase, the external drug treatment should follow the corresponding principle.
Complication
Coin-like eczema complications Complications pruritus
The disease occurs in the back of the hand, the upper limbs, the thighs, shoulders, buttocks and breasts. Skin lesions are patchy erythema, edema, blisters, scarred patches, clear boundaries, round or oval, about 5cm in size, so the shape is like a coin. There may be exudation, but thickening, scales, and hard, it is also like neurodermatitis. The patient has severe itching, compulsively scratching, and more often in the evening. Emotional stress, excessive drinking will make the condition worse. Histopathological changes are mainly formed by sponge in the epidermis, which can exclude neurodermatitis or psoriasis.
Symptom
Coin-like eczema symptoms Common symptoms Itching papules scaly skin blisters, posterior...
The skin lesions are scattered around a five-cent coin-sized round red patch on which acute or subacute manifestations such as papules, blisters, mild erosion, exudation, and scarring can occur, and lesions are rare with a diameter greater than 10 cm. Clearly, single or multiple (Fig. 1), often chronic, mild lichen-like scaly damage, sometimes central regression, like epidermis, often symmetrical, more common in the back of the hand and extremities, back, conscious Severe itching, common in men, the peak incidence is 55 to 65 years old, females are also the peak incidence in 15 to 25 years old, children are rare, mostly chronic, individual damage can last for a long time, repeated episodes in the process, mostly in winter Aggravation or recurrence, has the characteristics of recurrence in the original affected parts.
Examine
Coin-like eczema inspection
Staphylococcal or other microorganisms are found on the surface of active lesions of the patient. Therefore, it has been suggested whether the bacteria are allergic to the bacteria or the infection itself. Even people who use Staphylococcus aureus or Micrococcus as antigens are positive for the intradermal injection test. However, it has not been fully proved by experimental research.
Diagnosis
Coin-like eczema diagnosis and identification
diagnosis
According to the extension of the limbs and the back of the hand, there are groceries-like patches or plaques, which have the tendency of exudation and recurrence, and consciously itching. The general diagnosis is not difficult.
Differential diagnosis
Clinically, it should be differentiated from body lice, contact dermatitis, atopic dermatitis, and neurodermatitis.
