What are the causes of urtica?
There are many causes of urticaria and include allergens, skin and sensory sensitivity and other rare causes. Urticaria is the hives that are red, raised areas of the skin that can itch. When the allergen is presented in the body, mast cells produce histamine, which is then released into the surrounding tissues. Histamine causes close blood vessels to leak liquid, resulting in localized swelling and redness. Pain and itching is caused by irritation of nerve cells by release of histamine.
The hives can range from small elevated bumps to large spots that spread around the body. They can be bright red or light pinkish color. The reddish areas will be blanche, or it will be embarrassed when affected. The acute case of hives can take anywhere from a few hours to a few days. Any example of hives that lasts for more than six weeks is known as chronic urticaria. These include food, drugs, bee stings, insect bites and animal pelvis. It is possible for a person to experience a veilUp to a reaction, even if he was never exposed to an allergen or had a similar reaction before. If urticaria develops, the patient should be carefully monitored for signs of anaphylaxis.
Anaphylax reaction means that the hives develop internally, often in the area of the oral or neck. This can lead to serious respiratory problems. Urticaria is often the first symptom of anaphylactic reaction. Many people who have allergens and have experienced serious reactions in the past carry a syringe and doses of epinephrine that can be injected to load histamines in the patient. If you have both signs of a hill and complain about shortness of breath, it should be brought to the emergency room for monitoring and treatment.
skin and other sensory sensitivity are the altaway causes of urticaria. These include sensitivity to sunlight, water, temperature changes or pressure on the skin, for example when wearing too tight clothes. Reaction to the synthetMaterials in perfumes, deodorants and detergents can also increase histamine production, resulting in the outbreak of hives. Most of these cases of the hill may be reduced by changing products and clothing, as well as in the memory of light and temperature.
Other causes of the hill are more difficult to determine. Some people develop hives in times of excessive stress or excitement. Urticaria may also be a symptom of autoimmune diseases such as lupus. The hill trigger is often never identified and is marked as idiopathic.