A dermatologist talks to you: What are the common causes of urticaria?

Urticaria is a common allergic skin disease, it can be said that many people have either had urticaria themselves, or seen family members or friends suffer from urticaria.

The occurrence of urticaria is due to the temporary dermal edema reaction on the skin after the body is stimulated, which is manifested as a red wheal of different sizes and irregular shapes on the skin, accompanied by itching and discomfort, and the rash may increase or even merge into pieces after scratching. The duration of urticaria rash generally does not exceed 24 hours, most of which can gradually subside within a few hours and "disappear", but new erythema and wheals will "rise and fall", and severe patients may also have systemic symptoms such as poor breathing, mental irritability, nausea and vomiting, and decreased blood pressure.

Everyone's "physique is not the same", the corresponding "allergens" that can cause allergies are also different, so the "causes" of urticaria are quite complex, most patients with urticaria can not find the exact "allergy factors", may be "confused" contact with allergens appear urticaria symptoms, and "confused" These symptoms have "suddenly" disappeared (although most people are good after using anti-allergic drugs).

Relatively "acute urticaria" allergens are a little "easier to spot" (perhaps because of the substances exposed to in the short term and the places they have visited are easier to find and recall), but a significant number of patients (especially those with chronic urticaria) cannot find the exact cause.

Common causes of urticaria include (including but not limited to):

1, a variety of foods: a variety of "high-protein food", such as fish, shrimp and crabs, cattle, sheep and dogs, eggs, etc. are the most common, or some condiments, spices or fruits.

2, some drugs: drugs are also very easy to cause allergic diseases, common allergy drugs are "anti-inflammatory and analgesic drugs", "sulfonamide drugs", "sleeping sedative drugs", "antibiotic drugs", "certain Chinese medicine ingredients" and so on.

3, a variety of infections: a variety of pathogens such as "viruses, bacteria, fungi, parasites, etc.", which itself can be used as "allergens", but also through the stimulation of the body's immune system and cause allergies. The most common condition is the "infectious urticaria" condition caused by an "upper respiratory tract infection".

4, a variety of physical and chemical stimuli: a variety of physical and chemical stimuli in the living environment, such as cold, heat, light, friction, pressure and other physical stimuli, as well as contact with a variety of chemicals, etc., may be allergens.

5. Animal and plant factors: various animal and plant-related stimuli in the surrounding environment, such as arthropod bites, animal hair dander, feathers, dust, pollen, etc.

6, mental factors: mental factors and emotional factors can affect the operation of many systems of the body, for example, some people are in a state of "mental tension and excessive fatigue" for a long time, which will naturally have adverse effects on the body's "endocrine system, digestive system, immune system", etc., and are prone to various diseases.

7, there may be some special factors, it is necessary to analyze the specific problems.