Urticaria Itchy symptoms to watch out for

Urticaria is a disease characterized by itchy, raised rashes (wheals) surrounded by red lesions (flares). The rash can appear all over the body, face, trunk, and limbs. The rash disappears within 24 or 48 hours, leaving no trace.
Types of urticaria are divided into 2 types:
1. Acute urticaria is a rash that lasts for less than 6 weeks. It occurs frequently in both children and adults. Most patients recover from the disease within 3-6 weeks.
This is a very important type because some patients may have a severe allergic reaction called “anaphylaxis.” In addition to the rash mentioned above, there will be swelling of the face, around the eyes, mucous membranes of the mouth, swelling of the mouth. Including swelling ทางเข้า ufabet of the mucous membranes in the respiratory tract, such as the trachea, causing chest tightness, shortness of breath, to the point of shock and unconsciousness. This is an emergency that requires medication, observation of symptoms, and hospitalization for treatment.
Common causes of acute urticaria
1.1 Food allergies usually start in childhood. The causes of food allergies include cow’s milk, egg yolk, egg white, nuts, wheat, and shellfish. If you eat the food you are allergic to, within 6 hours you will develop hives and can become severely allergic, such as anaphylaxis.
1.2 Drug allergy, such as penicillin, NSAID pain relievers, or contrast agents injected during a CT scan, can also cause acute urticaria.
1.3 Viral infections such as childhood rash fever or certain bacterial infections that cause abscesses, resulting in hives.
1.4 Insect bites such as bees, ants, wasps, hornets, etc
2. Chronic urticaria is a rash with symptoms at least 2 times a week and lasting more than 6 weeks. It usually occurs in middle-aged patients aged 20-40 years and is rarely found in children.
The causes of chronic can be classified into subgroups based on etiology and pathogenesis as follows:
2.1 Spontaneous urticaria Most cases have no known cause, but may be caused by underlying conditions such as antibodies to thyroid disease, dental caries, gastritis caused by H. pyroli infection, etc.
2.2 Physical urticaria is a rash caused by physical factors. That is, when a stimulus is received, it causes urticaria, such as:
2.2.1 Cold after exposure to cold or ice.
2.2.2 Aquagenic after contact with water
2.2.3 Cholinergic after sweating during exercise or when the body temperature rises after heavy exercise can also cause
2.2.4 Heat after exposure to heat
2.2.5 Solar after exposure to ultraviolet light and visible light.
2.2.6 Delayed pressure after pressure, such as tight bra straps or wearing pants that are too tight, can cause pressure urticaria.