Children’s swollen and itchy finger joints may be caused by acute urticaria, eczema, contact dermatitis, etc., and should consult the doctor in time to find out the cause. 1. Acute urticaria: acute limited edema caused by food, drugs, infections or some physical factors, the skin will appear as a windy doughnut-like lesions, usually accompanied by intense itching. 2. Eczema: a type of allergic dermatosis caused by a variety of internal and external factors, with more lesion patterns, which can be categorized into small papules, red papules, small blisters, papules, etc., accompanied by intense itching. 3. Contact dermatitis: mainly caused by contact with certain exogenous substances, commonly including plant, animal, chemical substances, etc., the patient is conscious of itching, burning, swelling and pain in the affected area, and in severe cases, chills, fever, headache, nausea and other systemic reactions can occur. Parents are advised to bring their children to the doctor in time if physiological causes are excluded, and to avoid children scratching the affected area during the period.