Artificial urticaria
Introduction
Introduction to artificial urticaria Artificial urticaria, also known as skin scratching urticaria, is an increase in the physiological response of patients with weaker mechanical stimuli. It produces wheal on the skin and can occur at any age. The patient complained that after the scratching, or in the tight belt, garter, etc., the local wheal was itching, and the wind group produced more due to scratching. The disease can be present at the same time as other types of urticaria. Clinically, it is divided into two types: simple skin scratches and symptomatic skin scratches. Simple skin scratching refers to the appearance of a strip of red and slightly higher than the skin after scratching the skin with nails or other blunt objects. No other discomfort disappears after ten minutes, which is mostly physiological. Physical response. Symptomatic skin scratches are more common in young people with allergies. After the skin is scratched, erythema can appear, and the edges are accompanied by redness and itching. These two situations can sometimes appear on the same person. basic knowledge Sickness ratio: 5% Susceptible people: no specific population Mode of infection: non-infectious Complications: pruritus
Cause
Cause of artificial urticaria
Common among young people with allergies. The reason for this is due to the abnormal reaction of the skin after external physical stimulation, which causes the mast cells to release histamine-like biologically active substances, causing skin vasodilation, enhanced permeability, and penetration of plasma and tissue fluid into the dermis. . People with this kind of skin scratches often feel itchy skin for no reason, but unlike the common urticaria, the whole body has a rash, but when the skin is scratched with nails or other blunt objects, the skin appears first. The erythema of the tract, then the edema of the wheal is higher than the skin, and the blush appears on the edge of the erythema. Some patients with severe symptoms may experience swelling of the lips even after the lips are bitten by the teeth.
Various acute and chronic infection factors can also cause the disease, including bacterial infections, viral infections and parasitic infections. Many drugs and medical diseases can also cause urticaria. Mental factors and endocrine changes can also be affected by this disease.
Prevention
Artificial urticaria prevention
1, fasting spicy, seafood, alcohol.
2. Avoid scratching, rubbing and squeezing.
3. Perform allergen screening and keep away from allergens.
Complication
Artificial urticaria complications Complications pruritus
People with this disease may be allergic to some drugs.
Symptom
Artificial urticaria symptoms Common symptoms Wind erythema (border clear skin itching skin lined wind...
The disease can occur at any age.
The patient's skin is very sensitive to external mechanical stimuli. There is usually no wheal on the skin. If the skin is scratched or scratched with a blunt instrument, strips of wheal and itching will soon appear in the stimulating part, and will soon subside. Winds can also appear on the skin at pressure or tightness.
The disease can be present at the same time as other types of urticaria. The course of the disease is uncertain and can last for several months or for a long time.
Examine
Artificial urticaria examination
an examination:
The disease generally does not require special examination, and can be diagnosed by clinical symptoms. If you want to further examine the cause, you can screen allergens.
Diagnosis
Diagnosis and identification of artificial urticaria
Differential diagnosis
After scratching or scratching the skin with a blunt instrument, a strip of wind whistles appears there, which is not difficult to diagnose. Should be differentiated from angioedema, insect bite dermatitis.
