urticaria Dermatography (also known as dermographism , dermatographism or " skin writing ") is a skin disorder and one of the most common types of urticaria, affecting 2-5% of the population.
Video Dermatographic urticaria
Signs and symptoms
This condition manifests as an allergic reaction, causing a warm red wheal to appear on the skin. Because frequent scratches, which involve contact with other substances, can be confusing with an allergic reaction, when in fact it is a scratched action that causes swelling. These wheals are part of urticaria (itching), and appear within minutes, in some cases accompanied by itching. Rupture of the first urticaria may cause other reactions on the part of the body that are not stimulated directly, scratched, or scratched. In normal cases, the swelling will be reduced without treatment within 15-30 minutes, but, in extreme cases, itchy red sting may last from several hours to days.
Maps Dermatographic urticaria
Cause
Symptoms are considered histamine results released by mast cells on the skin surface. Because of the lack of antigen, histamine causes skin to swell in the affected area. If the membrane surrounding the mast cells is too weak it will be easily and quickly damaged under physical stress, which then causes an allergic reaction.
Symptoms may be caused or caused by:
- stress
- tight or rough clothing
- watch
- glasses
- hot
- cool
- pressure on the exposed skin
- infection
The underlying cause of dermographism is unknown, and it can last for years without help. This condition can be effectively eased and healed; However, it is often a lifetime illness. This is not a life-threatening disease, and it is not contagious.
Dermography may occur in mastocytosis (systemic mast cell proliferation).
Treatment
Dermografism can be treated with substances that prevent histamine from causing reactions (ie antihistamines). This may need to be given as a combination of H 1 antagonists, or possibly with a H 2 receptor antagonist such as cimetidine.
Free-sold vitamin C, 1000 mg daily, increases degradation and histamine removal.
Avoiding hot baths or showers can be helpful if conditions are common (ie whole), as well as possibly for localized cases (ie in certain areas). If a hot shower is helpful, it may be a condition called eczema bath. If it mainly affects the head, it may be psoriasis. In rare cases, allergy tests can reveal the substance suffered by the patient.
While cromoglycate, which prevents histamine from being released from mast cells, is used topically in rhinitis and asthma, is not effective orally to treat chronic urticaria.
See also
- Triple Lewis response
References
External links
Source of the article : Wikipedia
0 Comments