Thermal urticaria
Introduction
Introduction to hot urticaria Hot urticaria is a type of cutaneous urticaria that occurs in adolescence and usually occurs after exposure to heat (hot drinks, hot water baths), emotional agitation, and exercise. When you stop exercising or calm down, the symptoms can subside. In severe cases, it can take months or years for the symptoms to subside completely. basic knowledge The proportion of illness: 0.025% Susceptible people: more in youth Mode of infection: non-infectious Complications: abdominal pain, diarrhea
Cause
Cause of hot urticaria
1. Drug-induced: Most drugs are caused by allergic reactions. Common drugs are: penicillin, furazolidone, serum products, vaccines, etc. Its onset has a certain incubation period. The drugs such as aspirin, morphine, atropine, vitamin B1 and polymyxin are themselves histamine releasing agents, which can directly stimulate the release of histamine from mast cells and cause urticaria.
2, mental stress, mood swings, depression, etc. can also become a predisposing factor for urticaria.
3, food caused: mainly animal protein foods, such as fish, shrimp, crab, eggs, milk and other seafood is a common cause of disease. Some fruits and vegetables can also be sensitized. Adding food seasonings, preservatives, pigments, natural or synthetic substances in foods such as salicylic acid, citric acid, etc. can also cause urticaria.
4, cold, heat, daylight, friction, oppression, mechanical stimulation.
5, such as gastrointestinal diseases, tumors, connective tissue diseases, endocrine disorders, metabolic disorders, etc. can also become the cause of urticaria.
6. Inhaled animal dander, pollen, fungal spores, dust, feathers, etc.
7, such as bacterial infections, fungal infections, viral infections, parasitic infections can be caused.
8, easy to induce heat urticaria causes such as mosquitoes, cockroaches, bees, wasps and other insects.
Prevention
Hot urticaria prevention
1. Actively seek and remove the cause and possible causes.
2. Moderate diet, avoid eating spicy food, avoid taking suspected allergenic foods, drugs, etc.
3. Pay attention to climate change, warm and warm, strengthen physical exercise, enhance physical fitness, and maintain a good mentality.
4. Eliminate chronic lesions and intestinal parasites in the body and regulate endocrine disorders.
Complication
Hot urticaria complications Complications, abdominal pain, diarrhea
First, accompanying symptoms: people will induce skin lesions when they are nervous, the body is heated, and exercise. And the patient may be accompanied by headache, runny, dizziness, sweating and other symptoms during the onset of the disease, there may be satellite-like wheal distribution, the disease may be repeated.
Second, no rash: a main feature of hot urticaria is that there is usually no rash, but patients will have obvious acupuncture and itching, so if people have such symptoms after a lot of exercise, should Take care to prevent it, which is one of the typical symptoms of hot urticaria.
Third, the incidence of people: such urticaria occurs mostly in adolescence, after people encounter heat, emotional excitement and exercise. When people stop exercising or have a calm mood, their symptoms will subside, but there are also serious patients. It may take several months or years for the symptoms to completely resolve.
Fourth, severe cases may be accompanied by gastrointestinal symptoms, such as abdominal pain, diarrhea and so on.
Symptom
Hot urticaria symptoms Common symptoms Skin itching wind group local burning abdominal pain diarrhea
There is no rash, but it is obvious that there is acupuncture and itching.
Often in the trunk and the proximal skin of the limbs (except for the sputum and palm sputum), a red, 2 mm gust of wind is present. This gust of wind is fast and does not leave traces. Severe cases may be accompanied by gastrointestinal symptoms such as abdominal pain and diarrhea.
It occurs mostly in adolescence and occurs after exposure to heat (hot drinks, hot water baths), emotional excitement and exercise.
Examine
Hot urticaria examination
1, symptom check: hot urticaria is generally after exercise and emotional, or hot environment or hot drink, obviously feel the skin has acupuncture, itching, can appear wind rash or rash (higher than the skin) or skin rosy (not higher than the skin).
2, the characteristics of the disease asked: Like some patients have food dependence, that is, after eating a certain food, exercise or heat can attack. Some patients are related to sunlight, mainly after skin exposure to sunlight for several seconds to several minutes, local itching, erythema and wheal, angioedema, for 1 to 2 hours. More women.
3, experimental examination, skin scratch test, or intradermal test.
Diagnosis
Diagnosis and identification of hot urticaria
1. When the diagnosis of hot urticaria symptoms is diagnosed, it is necessary to distinguish between other diseases and to check the characteristics of the onset of heat urticaria. Like hot urticaria, it is usually after exercise and emotional, or after a hot environment or hot drink, it is obvious that the skin has acupuncture and itching, and there may be wind rash or rash (higher than skin) or skin rosy (not higher than skin).
2, through the examination of the onset of hot urticaria characteristics, pay attention to some special types of disease. Some patients have food dependence, that is, after eating certain foods, they can exercise after exercise or heat. Some patients are related to sunlight, mainly after skin exposure to sunlight for several seconds to several minutes, local itching, erythema and wheal, angioedema, for 1 to 2 hours. More women.
3. When examining thermal urticaria by experiment, it should be noted that some patients should not use the experiment. For patients with skin scratches, it is not appropriate to use the skin scratch test to check for hot urticaria. For those with severe allergic reactions, it is not suitable for intradermal test. In addition, these experiments to check for hot urticaria have their precautions before the experiment, so pay more attention to this.
