chronic urticaria
Introduction
Introduction to chronic urticaria The incidence of chronic urticaria accounts for about 2/3 of urticaria. Wind groups occur repeatedly, often for a long time, and often fail for more than two months. When passing through the middle and light weight, such as morning or before going to sleep, some have no regularity, systemic symptoms are generally light, most patients can not find the cause. basic knowledge The proportion of illness: 0.03% Susceptible people: no special people Mode of infection: non-infectious Complications: Gastrointestinal diseases Laryngeal edema
Cause
Chronic urticaria cause
There are many factors that cause urticaria, and the cause is more complicated. About 3/4 of the patients can't find the cause, especially chronic urticaria. Common causes of the disease are:
1. Foods such as fish, shrimp, eggs, and milk are the most common, followed by meat and certain plant foods such as strawberries, cocoa, and tomatoes. In addition, the spoilage food is decomposed into polypeptides, and the basic polypeptide is a histamine release. Protein foods are absorbed in the form of sputum or peptides before they are completely digested, which can cause urticaria, which is more common in children, and may also be caused by differences in the permeability of the digestive tract mucosa in children. In addition, pigments, flavoring agents, preservatives, and natural or synthetic substances in foods can also cause urticaria.
2, drugs can be divided into two categories, one is the formation of antigen-based drugs, such as penicillin, serum, vaccine, sulfonamide, furazolidone, and the other is histamine release agents, such as aspirin, morphine, codeine, peti Pyridine, polymyxin, vitamin B, quinine, hydralazine and the like.
3, infection of various infection factors can cause the disease. The most common are the virus and Staphylococcus aureus, followed by hepatitis, infectious mononucleosis and Coxsackie virus; parasitic infections such as aphids, hookworms, schistosomiasis, filarial, amoeba And malaria parasites; bacterial infections such as acute tonsillitis, alveolar abscess, sinusitis, impetigo, sepsis, etc.
4. Inhalation pollen, dust, animal dander, smoke, feathers, fungal spores, volatile chemicals (such as formaldehyde, acrolein, pyrethrum, cosmetics, etc.) and other airborne allergens.
5. Physical and mechanical stimuli such as cold, heat, sunlight, friction and pressure.
6, animal and plant factors such as insect bites, poisonous burrs (such as caterpillars, beetles and moths scales into the skin) and contact with castor, wool and so on.
7, mental factors nervous or excited, caused by the release of acetylcholine after exercise.
8, visceral and systemic diseases such as rheumatic fever, rheumatoid arthritis, systemic lupus erythematosus, malignant tumors, hyperthyroidism, hyperlipidemia, endocrine changes (menstruation, pregnancy, menopause), infectious mononucleosis and Chronic diseases such as cholecystitis, nephritis, diabetes, etc.
Prevention
Chronic urticaria prevention
Identify the cause of the disease as much as possible and remove it. If you are careful to inhale pollen, animal dander, feathers, dust, castor powder, avoid contact with allergens, disable or fasten certain drugs or foods that are allergic to the body. If recurrence due to cold and heat stimulation, should not be excessively avoided, on the contrary should gradually contact, and gradually extend the time of hot and cold stimulation, in order to adapt.
For travellers, it is best to wear a mask when traveling, and the weather is cool in the fall. Wearing a mask will not feel too uncomfortable, but it can filter out the bad pathogenic dust in the air and make urticaria happen. The rate is greatly reduced. Especially in the wild or in the countryside, where there are more pollen and animal feathers, more attention should be paid.
Active treatment of primary diseases, such as acute tonsillitis, cholecystitis, viral hepatitis, appendicitis, intestinal tsutsugamushi, etc., to eliminate the source of the disease.
Complication
Chronic urticaria complications Complications, gastrointestinal disease, laryngeal edema
Chronic urticaria often has an acute outbreak. In severe cases, there may be serious types such as laryngeal edema and gastrointestinal urticaria.
Symptom
Chronic urticaria symptoms Common symptoms Skin itching rash nipple edema
Often, from time to time, on the body, face or limbs, a piece of red, swollen and itchy rash is formed. The rubella is flat red or yellowish or pale edematous plaque, and the edges of the ear are flushed. Often, the more itching, the more itchy, the more it catches.
Sometimes, the rubella block is ring-shaped and can be called a ring-shaped urticaria. Several adjacent ring-shaped lesions can be connected or fused to form a map, which can be called a graphic urticaria. Sometimes, there is a stasis in the center of the lesion, which can be called hemorrhagic urticaria, and the kidney and the gastrointestinal tract can bleed at the same time. When there is a blisters in the rubella block, it is called vesicular urticaria. When there is a bullous, it is called bullous urticaria. Sometimes, blisters or bullae occur on seemingly normal skin, but often have a blush, which is more likely to occur in children.
The number of episodes varies from several times a day to several days. It can be several months or years.
A few minutes before the appearance of the rubella block, it is often itchy or tingling. Some patients may have some symptoms in the body within a few hours or a day or two, such as: poor appetite, general malaise, headache or fever.
Examine
Chronic urticaria examination
1, check
Chronic urticaria histopathology: simple local edema, serous exudation of the upper nipple and dermis, papilledema, a small amount of lymphocyte infiltration around the blood vessels, but infiltration can also be dense and mixed with eosinophils.
2, identification
Acute urticaria is a common form of urticaria, accounting for about one-third of all urticaria. Generally seen in acute allergic reactions. The onset is rapid and the rash is pleomorphic. Mainly manifested as rash, papules, blisters, erosion, exudation, scarring, etc. on the basis of erythematous edema, the damage to the realm is unclear, in severe cases, the body can be generalized and itching is severe.
Diagnosis
Diagnosis and identification of chronic urticaria
Diagnosis can be made based on medical history, clinical manifestations, and examinations.
