Itchy skin bags, may be pruritus, insect bite dermatitis, urticaria, etc., the patient should consult a doctor in a timely manner to clarify the cause of treatment. 1. Pruritus: dry skin and other factors lead to pruritus can cause itchy skin, scratching can appear erythema, pimples, scratches, such patients should avoid scratching the skin, if necessary, can be taken orally chlorpheniramine maleate and other antihistamine medication. 2. Insect bite dermatitis: bedbugs, mosquitoes and other bites after the skin will also appear insect bite dermatitis with itching, scratching the skin redness and swelling is more pronounced, such patients in the onset of more than to go to the grass, woods and other mosquitoes more places, can be localized use of glycerine lotion, fluticasone propionate cream and other medications for treatment. 3. Urticaria: If the patient is in contact with pollen, dust after the skin itching a scratch on the bag, should be considered allergic to urticaria, this group of people may also be accompanied by angioedema, chest tightness and other symptoms, you can use loratadine, cetirizine and other antihistamine drugs for treatment. In addition, infections are a common cause of urticaria. All of the above medications should be used under a doctor’s supervision.