Sudden, painless local edema

Introduction Sudden, painless local edema is a category of allergic diseases. Common in angioedema, contact dermatitis and so on. When edema, you should go to the hospital in time to find out the cause and treat under the guidance of a doctor. Allergic edema manifests as sudden, painless local edema. It belongs to the category of allergic diseases. The edema is local or systemic swelling caused by the accumulation of water in the extracellular fluid of the body. Puffiness is associated with many organs of the body, and the causes of edema are numerous and complex. The environment, lifestyle, behavior, etc. in which it is located may cause edema.

Cause

Sudden, painless local edema is common in angioedema, contact dermatitis, etc. It is a manifestation of antigen-antibody reaction. It mainly releases histamine through mast cells, activates the kinin-producing system to release kinins and promotes the synthesis and release of prostaglandins, causing arterial congestion and increased microvascular wall permeability, leading to the formation of edema. Can occur quickly and can be accompanied by abnormal feelings such as itching and pain.

an examination

Related inspection

Blood test hepatobiliary imaging

Diagnosis of sudden, painless local edema: sudden, painless, hard and elastic local edema, more common in the face, tongue, lips, etc., is the characteristics of angioedema. Angionautic edema (angioneurotic edema), also known as giant urticaria (gianturticaria) or Quincke edema, is one of the allergic reactions and belongs to the first type of allergic reaction. It is characterized by sudden onset, localized edema, and rapid regression.

Differential diagnosis

Differential diagnosis of sudden, painless local edema:

(1) Local edema with redness, heat, and pain: more common in edema caused by local inflammation, flushing, burning, and pain in the affected area.

(2) local edema with cold, varicose veins: this is due to local venous return obstruction. Can be seen in the superior vena cava obstruction syndrome, limb venous thrombosis, thrombophlebitis, varicose veins of the lower extremities.

(3) Local edema with rough skin and thickening of the affected area: mainly caused by filariasis. This is due to the obstruction of lymphatic drainage caused by filariasis. It is characterized by rough skin and thickening of the affected part, such as pig skin, and wrinkles, and the subcutaneous tissue is also thickened.

(4) sudden, painless local edema: sudden, painless, hard and elastic local edema, more common in the face, tongue, lips, etc., is the characteristics of angioedema. In the category of allergic diseases, patients often have a history of allergies to certain drugs and foods.

(5) Local edema after surgery: Some patients have swelling of the limbs after surgery, which is caused by local lymphatic drainage after surgery.

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