A red stripe will appear when the skin is scratched

Skin health has always been an issue of concern to everyone. In fact, the skin may be scratched by force or abraded by some sharp objects, causing some red stripes to appear on the skin. Some people will have a red stripe when their skin is lightly touched. This indicates a sensitive physique and needs to be checked and diagnosed through some methods.

Causes

It is mostly caused by an allergic reaction of the skin after external physical stimulation, which causes mast cells to release biologically active substances such as histamine, causing the skin capillaries to dilate, the permeability to increase, and the penetration of plasma and tissue fluid into the dermis.

1. Diagnosis

1. The patient's skin is very sensitive to external mechanical stimulation. There are usually no wheals on the skin. If the skin is scratched with fingernails or blunt objects, strip-shaped raised scratches will quickly appear at the stimulated site.

2. Infectious lesions in the body, diabetes, thyroid dysfunction, menopause, etc. are often related to the onset of the disease. Trauma, clothing, friction, bands, scratching, etc. can all cause wheals and itching.

3. The course of the disease is uncertain and may last for several months or exist for a long time.

4. In addition, in rare cases, the wheal reaction will reappear at the original site half an hour to 5 or 6 hours after the skin scratches subside, and may last up to 48 hours. This is called delayed skin scratches.

2. Differential Diagnosis

Crush syndrome occurs when the limbs or muscle-rich parts of the trunk are subjected to long-term compression by heavy objects and the compression is relieved. Acute renal failure is clinically characterized by limb swelling, myoglobinuria, and hyperkalemia.

Treatment and care

1. First-line treatment drugs: Antihistamines are the main treatment drugs for chronic urticaria. They can reduce itching and wheals.

2. Second-line treatment drugs: Corticosteroids: When adequate doses of antihistamines are ineffective for chronic urticaria, oral corticosteroids may be occasionally required to shorten the duration of the disease. Epinephrine: For angioedema of the labial mucosa, direct inhalation of epinephrine spray can achieve certain therapeutic effects. Thyroxine: When CIU patients develop thyroid autoimmunity and thyroid autoantibodies are positive, thyroxine can be used for treatment.

Leukotriene receptor antagonists: Chronic urticaria is difficult to treat with antihistamines alone and often fails to achieve satisfactory results. Montelukast is a leukotriene receptor antagonist. Sulfapyridine: It can be used to treat chronic urticaria and delayed pressure urticaria. Others: Colchicine, hydroxychloroquine, dapsone and indomethacin are significantly effective in treating urticarial vasculitis.

3. Third-line treatment drugs: immunosuppressants. Of course, medication must be used under a doctor's prescription.

Preventive Care

1. Cold compress: When urticaria occurs and the itching is unbearable, cold ice compress can be used to relieve the symptoms.

2. Avoid hot water: You can use soap or shower gel to take a bath, but avoid hot water, because hot water will dilate blood vessels and make the rashes worse.

3. Use anti-itching ointment: Applying alkaline substances, such as magnesium oxide emulsion, can improve the condition.

4. Avoid eating foods that may trigger allergens.