Baby scalp itchy old scratch may be caused by mosquito bites, baby eczema, seborrheic dermatitis and other reasons, can be treated through general treatment, medication and other ways of treatment relief. 1. Mosquito bites: mosquito bites on the head of infants may cause localized dermatitis, scalp itching, tingling and other symptoms, may appear baby scalp itchy old scratched. Can be applied through the use of drugs such as Dinaid cream, combined with bacterial infection can be applied mupirocin ointment and so on. 2. Infantile eczema: there are often symptoms such as redness, swelling, itching, etc. When eczema appears on the head, it may appear that the baby scalp is itchy and scratching. It can be treated with medicines such as glycerite lotion and hydrocortisone ointment. 3. Seborrheic dermatitis: it may be caused by heredity, fungal infection and other reasons, often with the affected area itching, gray-yellow scabs and other symptoms, there may be a baby scalp itchy old scratching situation. Prednisolone acetate cream, econazole nitrate cream and other medications can be used to treat the condition, and attention should be paid to other ways to alleviate the symptoms such as washing the scalp with lukewarm water. The baby scalp itchy old scratching situation, it is recommended under the guidance of the doctor to clarify the cause of treatment, avoid self-medication, the medicine is not appropriate, causing discomfort.