Medical Encyclopedia

Hives

What is hives?

Hives (urticaria) is a type of allergy, which is characterized by specific changes in the skin and periodic renewals, despite the complete recovery of the patient. In addition, often due to severe itching general health of the patient worsens.

Edema and blisters skin that characterize urticaria, occur within several minutes, and sometimes after only a few hours. Blisters are large, the size of a lentil or chicken egg, usually red, can spread throughout the body, but usually their favorite localization - face or any part of the body (usually the head). Merger blisters is possible, but in some cases their boundaries clearly defined. Sometimes blisters appear on the skin, which after some time burst, whereby fluid is released from these (exudate). It is dry on, and in that place the scabs are formed. Even if untreated hives disappear in 2-3 days, but after some time the rash renewed.

Symptoms of hives

  • The appearance of the skin blisters.
  • Itching.
  • Oozing blisters.

Causes of hives

Like many other hypersensitivity reactions, hives is associated with congenital disorders of immune regulation. In the body of the patient, as a response to various negative factors, antibodies are produced too much. It is not always possible to establish that in the particular case cause hives. Often it comes from an insect bite or sting. In addition, urticaria may be resumed at the use of penicillin and sulfonamides. Sometimes it appears as a result of hormonal disorders or taking certain foods. Unusual reactions of the human body can be caused by physical stimuli, such as heat, cold.

Treatment of hives

When an antigen is identified (substances that contribute to allergy) to a clear manifestation of any ailments desensitization may be attempted. Doctor periodically introduces antigen, gradually increasing the dose. This leads to the formation of so-called blocking antibodies. More severe exacerbation of hives is treated with antihistamines and corticosteroid medications.

Hives

Often the patient himself knows what causes hives and should avoid the stimulus.

In essence, hives is not a dangerous reaction of the organism, even untreated, it disappears in a few days. If it does not go long (more than 6 weeks), the patient needs a thorough examination at the hospital: it is necessary to analyze the gastric juice, x-rays of the stomach and intestines, laboratory tests of liver function. In addition, it is necessary to look for antibodies - specific pathogens of hives.

During exacerbation doctor will prescribe an antihistamine drugs and glucocorticoids. In uncomplicated cases these drugs are administered in tablets, in hard cases - intramuscularly or intravenously.

Is hives dangerous?

Hives is not dangerous. The big danger is swelling of the mucous membranes of the mouth and upper respiratory tract, which can cause the patient's asthma. A person suffering from hives (urticaria) should be careful, as it can have severe allergic reactions, such as the development of asthma.

When brushing and rubbing bacterium can penetrate into the damaged skin layers and promote skin diseases.

Other articles on this topic:

Keratosis

Ichthyosis