Children’s itchy skin always scratching may be mosquito bites, atopic dermatitis, scabies and other factors. 1. Mosquito bites: in the summer mosquitoes are more, the child’s skin parts of the bite, will lead to skin allergies and itching, and often scratching, may also be accompanied by redness, localized pimples or spindle-shaped masses. 2. Atopic dermatitis: the disease may begin to develop in infancy, after consuming allergenic foods, such as seafood, may cause an allergic reaction, which will lead to localized itching, itching is more intense, may also be accompanied by tingling, scratching excessively, but also make the local skin oozing. 3. Scabies: usually associated with scabies mite infection, usually caused by contact infection, scabies mite parasites in the epidermis, causing local skin irritation, often in the skin at the delicate place of pimples, papules, accompanied by intense itching, characterized by intense itching at night. The child’s itchy skin always scratching, parents are advised to take the child to the hospital dermatology department for appropriate examination, clear diagnosis under the guidance of the doctor standardized treatment to avoid aggravation of the condition.