In spring, willow wadding is one of the more common allergens that can cause allergic reactions to the skin. Symptoms of allergy: Willow wadding can cause local skin contact allergy and may also cause inhalation systemic allergy. Symptoms of allergy are erythema, papules, and flaking of the skin, usually accompanied by itching. Causes of allergy: Willow wadding can cause inflammatory allergic mediators to be released through various pathways after contact with the skin or inhalation, causing pathological changes such as increased vascular permeability, tissue damage, and increased mucus secretion, resulting in a series of allergic symptoms. Determination of allergens: Whether allergy to willow wadding can be determined by general allergen blood test or skin prick test. Prevention of allergy: 1. Strengthen protection: Outdoor activities should be well protected, avoid contact with or inhalation of willow wadding, try to clean skin and clothes after outdoor activities, clean the room regularly and pay attention to ventilation. 2, enhance skin barrier function: good skin moisturizing and skin care work, can enhance the skin barrier resistance, effectively reduce or alleviate the symptoms of allergic reactions. 3.Improve body resistance: a balanced diet, strengthen nutrition, quit smoking and limit alcohol, and exercise properly can improve the adaptability and tolerance of the body and reduce or avoid allergic reactions. Avoid spicy and stimulating food to avoid aggravating allergy symptoms. Treatment of allergy: When allergic symptoms occur, if the symptoms are mild and the area is small, local topical medication can be used, if the symptoms are heavy and the area is large, additional medication can be used for systemic treatment. Topical treatment drugs: 1, glucocorticoids: such common drugs include mometasone furoate cream, halometasone cream, etc., the face, folds must be used with caution. 2, calcium phosphatase inhibitors: such common drugs include tacrolimus ointment, pimecrolimus cream. Systemic treatment drugs: 1, antihistamines: common antihistamines include paracetamol, loratadine, cetirizine, etc. 2.Glucocorticoids: If the condition is severe, systemic glucocorticoid therapy can be used when the condition is evaluated and there are no contraindications, commonly including dexamethasone, prednisolone acetate tablets, methylprednisolone tablets, etc. 3.Desensitization therapy: Desensitization therapy is the use of desensitization solution subcutaneously injected several times, is the cause of treatment, but also the treatment of allergies effective method.