Urticaria is a chronic skin disease that people experience in daily life. It occurs mostly in spring and autumn. Is urticaria contagious? What is the cause of urticaria? What are the symptoms of urticaria? Today, let me take you to find out. Is
urticaria contagious?
urticaria is not contagious. Urticaria should be detected and treated as early as possible. It is best not to delay, so that children can play with other friends happily again.
Urticaria is simply a skin allergy, but it is not a contagious disease, because the urticaria is caused by the patient’s contact with some allergic substances, or the patient’s own allergic constitution, after being exposed to these allergens Later, there was an allergic reaction.
The causes of urticaria are very complicated. It may be related to contact chemicals, dust in the air, mosquito bites, food, drug temperature, mood, stress, fatigue, and even hormones. The situation will be a little different, not all of them are allergic, not everyone is allergic to seafood, eggs, milk, and not necessarily allergic to antibiotics. This is completely different from person to person. The desensitization test can help you find allergens, but the process is quite complicated, and most people still can’t find the answer even after the desensitization test, so in the end they have to rely on themselves bit by bit from life experience Observe slowly, find out the timing and frequency of the onset, close to a certain detail in life, and avoid contact with it, and remove allergens from the rule of thumb.
How does urticaria cause
Generally speaking, urticaria can be divided into two types, acute and chronic, with acute being the majority. There are many reasons for urticaria. The more common ones are because of the special constitution of some people, and the immune system in the body produces allergic reactions to certain external substances (allergens); when these people eat, inhale or come into contact with these In the case of certain substances, urticaria will occur due to the expansion of blood vessels and increased permeability of the skin due to allergic reactions.
common causes of urticaria are as follows:
1, food-based
foods are fish, shrimp, crabs, and eggs. Secondly, certain spices can also cause urticaria.
2, contact
such as ivy (plant), drugs applied to the skin, animal insect saliva.
3, injectable
such as drugs, especially penicillin is common; blood transfusion reactions, insect bites, allergies, allergen extraction fluid injections, etc.
4, inhalable
such as pollen, mold, animal feathers and dander.
5, infectious
infections such as parasites or viruses, including viruses (such as the above-mentioned virus, hepatitis virus), bacteria (such as golden grapes), fungi and parasites (such as roundworms, etc.) can cause urticaria.
6, physical factors
cold, heat, pressure, sunlight, friction, temperature changes.
7, after exercise
after taking drugs or food, exercise causes a rash.
8, systemic infectious diseases
such as collagen disease, vascular inflammation, serum sickness, etc.
9, other disease factors
gastrointestinal diseases, metabolic disorders, endocrine disorders and mental factors can also cause urticaria.
10, genetic related factors
familial urticaria, hereditary angioedema.
11, chronic urticaria and angioedema, sometimes the cause is difficult to determine
urticaria symptoms. Urticaria is commonly known as rubella, "wind lumps", which refers to the swollen parts of the skin, which appear in different shapes and sizes. Baby urticaria is generally easy to distinguish. The swollen part of urticaria is convex and white in the middle, with red edges, and it is usually itchy.
Urticaria often appears repetitive. Your baby may have hives here after a few minutes or a few hours, and new ones will grow there. If the hives appear suddenly, it may last from a few hours to a few days. However, urticaria may repeat for several months at a time.
Symptoms of urticaria
1, acute urticaria
Acute urticaria in children is often acute, with itching and wind all over the bodyMasses, rash, and high fever. Most children have no other discomfort except for the itchy skin; a small number of children with internal organs have fever, headache, suffocation, nausea, vomiting, diarrhea, abdominal pain and other discomforts; in severe cases, blood pressure drops or even Shock, natural recovery within 1-2 weeks should be actively treated.
2, chronic urticaria
skin lesions recurrent more than 6 weeks, it is chronic urticaria. Chronic urticaria is a disease for which the cause is often not found. Patients often have red, swollen and itchy rashes on the body, face or limbs from time to time. The more itchy scratches, the more swollen they scratch. The number of attacks varies from several times a day to once every few days. The severity and incidence of illness can also vary from person to person, with great differences.
3, special types of urticaria
(1) Cholinergic urticaria: It is a kind of rubella that people often say. It usually occurs in adolescence. It occurs when you are exposed to heat, mental stress, hot food or drink, or after exercise, your body temperature slightly increases. When you stop exercising or calm down, the symptoms will subside. In severe cases, the symptoms may completely subside. It will take months or years. This kind of wind group goes fast and fast without leaving a trace. Severe cases may be accompanied by gastrointestinal symptoms, such as abdominal pain and diarrhea.
(2) Cold urticaria: The cold urticaria that occurs frequently in winter is a special type of urticaria. It is an allergic reaction caused by exposure of the human body to a cold environment. It is more common on the face and hands, but can also affect other parts of the body. Some have headaches, skin flushing, hypotension and other systemic symptoms. In severe cases, shock can occur.
In addition, there is also a familial cold urticaria, which often occurs in infancy and can be seen as early as 1 week after birth. The patient develops a rash within half an hour to 4 hours of exposure to the cold without itching. The rash is erythema and wind mass, accompanied by systemic symptoms such as fever, cold tolerance, joint pain, and headache.
(3) Papular urticaria: Papular urticaria is a pruritic skin disease that tends to occur in infants and children. The skin lesions are often round or spindle-shaped rubella-like lesions, with needles to bean-sized blisters on the top, scattered or distributed in clusters. It usually occurs on the extensible limbs, trunk and buttocks. Usually after a few days to more than a week, the skin lesions will subside on their own, leaving temporary pigmentation spots. Skin lesions can often appear in batches one after another for a period of time. Urticaria itching is severe, and pyoderma can be caused by repeated scratching. The etiology of
urticaria is more complicated, and most of them are thought to be related to insect bites, such as fleas, lice, mites, midges, bed bugs and mosquitoes.
(4) Peptone-induced urticaria: When eating too much (overeating pork and seafood) at one time, and at the same time being agitated and drinking a lot of alcohol, skin congestion, redness, wind masses, headache and fatigue occur. The course of the disease is very short, lasting only 1 to 2 days, and most of them disappear within 1-4 hours. It is an antigen-antibody reaction.
(5) Solar urticaria: It is mainly manifested as itching, erythema and wind masses, and angioedema after the skin is exposed to sunlight for several seconds to several minutes, lasting 1-2 hours. It is more frequent in women.
(6) Skin scratch syndrome: also known as artificial urticaria. After scratching by hand or scratching the skin with a blunt tool, a striped bulge along the scratch, accompanied by itching, subsided soon. Can occur alone or with urticaria. Can occur at any age. There is often no obvious cause, and it can also be caused by drugs (especially penicillin).
(7) Compressive urticaria: It occurs 4-6 hours after the skin is under heavier and longer-lasting compression. Diffuse and unclear edematous painful plaques occur in the compressed area, involving the skin and skin tissues. Easily occurs in palms, plantars and buttocks, usually lasting 8-12 hours. Sometimes it can be accompanied by chills, headaches, joint pain, and general malaise.
Conclusion: The above is the introduction of the infectiousness of urticaria and the causes and symptoms of urticaria summarized by Sanjiu Yangshengtang. I hope that the introduction of the editor can be helpful to everyone. In daily life, we must also develop good habits, avoid allergens, eat more fruits and vegetables, in order to effectively avoid the occurrence of urticaria.
