There is a rubella-like thing on my waist in summer, which itches like a mosquito bite, but not in winter. What happened?

Why do many people get urticaria in hot summer?

1, caused by improper diet on summer nights. Fish, shrimp, crabs and eggs are the most common foods that cause urticaria. Some meat and some plant foods such as strawberries, cocoa, tomatoes, coffee, garlic and other condiments can cause urticaria.

2. The most common indoor allergen-dust mite. Dust mites are arthropods that feed on human dander and often live in sheets, blankets and quilts. In addition, dead corners and carpets in the house can also be their homes. According to foreign statistics, more than 70% families have dust mites. The most allergic thing is the excrement of dust mites-dung balls. Usually April-May and 7- 10 are breeding seasons, when the number of dust mites at home is the largest. Therefore, people who are allergic to dust mites have symptoms all year round and may get worse during the breeding season. Patients can manifest as urticaria, asthma, eye rhinitis, etc. And the symptoms tend to get worse after lying down at night.

3. Always keep the air-conditioned room. Now someone has urticaria and I don't know why. It may have a lot to do with your long-term expectation in an air-conditioned room. The air conditioner is cold, which is fatal to people who are afraid of cold, leading to small acne and obvious itching. Therefore, for people who are afraid of cold, it is not recommended to stay in an air-conditioned room for a long time, and don't set the temperature too low.

There are many mosquitoes in summer. Summer is the world of mosquitoes. Often when you think it doesn't exist, when you are not ready to kill mosquitoes, you will become the meat on the mosquito's plate. Then this is the main reason why you are targeted by urticaria. For urticaria caused by mosquito bites, you can use mosquito repellent, toilet water and mosquito killer to meet it all; And don't go deep into the grass.

5, love to sweat when moving. It's summer and it's very hot. When you go out for a walk, the sweat will keep flowing downwards. This is also an important cause of urticaria. When people are hot and nervous, they will induce or aggravate the symptoms of urticaria. For this kind of people, summer is a disaster season, so it is suggested to improve the allergic constitution, fundamentally solve the problem, and let urticaria not happen again.

What are the symptoms of urticaria in summer?

At the initial stage of the disease, patients with urticaria usually have itching symptoms in local areas of the patient's skin, and then quickly develop a rash. Some patients will have other systemic symptoms within a few hours after the rash appears, such as discomfort, headache or body fever.

The rash on patients is usually flat, red, yellow or light. Sometimes, the appearance of rash is annular, which can be called annular urticaria, and several adjacent annular lesions can be connected or fused to form a complex.

Hemorrhagic urticaria is caused by petechiae in the lesion center of the patient, which leads to bleeding of the kidney and gastrointestinal tract together. When blisters appear in the rash, it is called vesicular urticaria. If there is a bulla, it is more serious, usually called bullous urticaria. Sometimes, blisters or bullae appear on seemingly normal skin, but they often turn red. This rash is more likely to occur in children.

How to deal with the occurrence of urticaria in summer

1, allergic urticaria is caused by allergies. Patients must stay away from allergens in their daily lives. Drug-induced people should stop using allergic drugs. Foodborne people should not eat such foods, such as mussels, shrimps and crabs, after finding out allergic foods.

2. Antihistamines are important drugs for the treatment of various urticaria patients, which can control the symptoms of most patients. Although antihistamines cannot directly antagonize or neutralize histamine and prevent its release, they can compete with histamine and quickly inhibit the generation of wheal. There are many side effects of antihistamines, so it is best to choose the one with small side effects, especially for workers working at high altitude and drivers, who use it with caution and are prone to accidents due to drowsiness. Long-term use of one antihistamine is prone to drug resistance, and another can be used. Or alternatively or in combination. Children's drug resistance is greater than that of adults, so the relative dosage is also greater.

3. The immune function of human body is disordered due to the stimulation of allergens, which leads to the abnormal increase of immunoglobulin E in the body. Repeated contact with allergens causes a large number of IgE antibodies to be produced in the body and attached to immune cells for a long time, which leads to the secretion of inflammatory mediators such as histamine and harms the immune response of the body. From the immunological point of view of urticaria, the fundamental treatment should be to control IgE and adjust the balance of immunoglobulin. At present, the treatment of urticaria mostly stays at the stage of inflammation such as antihistamine. Some people will try to treat it by improving immunity, but allergy is not caused by low immunity, and the imbalance of five immunoglobulin secretion in human body is the root cause of the disease. At present, the treatment method of IgE anti-human antibody to solve urticaria in international immunology research is to reduce IgE antibody in human body by supplementing a large number of anti-allergic probiotics Xinmin Kang, and to regulate immunoglobulin balance by stimulating interferon secretion, thus restoring human immune response.

Due to urticaria caused by mosquito bites, there are many products on the market to prevent mosquito bites. The simplest method is to apply alkaline soapy water to the wound or wash the wound with salt water to soften the swelling and relieve itching. Experts said that citizens can also choose to eat more alkaline vegetables, so that their physique and blood will become slightly alkaline. Mosquitoes not only hate bites, but even after being bitten, the bite will not itch.