Bad habits that damage a child’s brain include inadequate sleep, uneven nutrition, and lack of physical exercise. 1. Inadequate sleep: children due to mental stress or physical insomnia, adenoid hypertrophy and other reasons can easily lead to lack of sleep, affecting the development of brain cells. 2. Unbalanced nutrition: Balanced nutrition is one of the necessary conditions to ensure healthy brain development. Because the development of the brain needs protein, fat, carbohydrates and a variety of trace elements and vitamins, if the lack of nutrients, it is easy to lead to poor brain development, damage to the child’s brain. 3. Lack of physical exercise: human beings are an organic whole, physical exercise accelerates blood circulation and strengthens the body, and the brain will also benefit from it. Therefore, sufficient sleep, balanced nutrition and active exercise can help the healthy development of the child’s brain.