Research has found that dandruff is caused by a disruption in the ecological balance of the scalp. A healthy scalp ecology is maintained by three major balances: oil, flora, and metabolic balance. When the balance is disturbed, dandruff will be produced. The amount of scalp oil secretion directly affects the number and balance of scalp flora. When there is too much oil secretion, the two main bacterial groups on the scalp – Propionibacterium and Staphylococcus – will be out of balance, and when oil increases Staphylococcus multiplies, while Propionibacterium decreases, and when scalp moisture increases oil decreases, the situation is just the opposite. In turn, the balance of water and oil is directly related to the body’s metabolism. Therefore, excessive metabolism, imbalance of secretion and dysbiosis are the main causes of dandruff. Specifically in children, it is often caused by the following problems: improper head care, high scalp oil secretion, and head dermatitis, which can reduce the generation of dandruff as long as they are treated symptomatically. The frequency of washing is also related to the child’s sweating, sports and hygiene, and should be combined with the actual situation. 2, symptomatic treatment, for seborrheic dermatitis or other dermatitis to actively treat. 3, adjust the diet, it is advisable to eat food rich in vitamin B2, B6 and vitamin E, reduce spicy, greasy food. If your child has obvious manifestations of itchy head and ringworm, it is recommended to go to the dermatology department for examination and treatment.