Frequent waking up at night in eight-month-old babies can be considered to be related to bedtime feeding factors, vitamin D deficiency rickets or pinworms and other reasons. 1. Physical factors: too much or too little feeding before bedtime can lead to baby bloating or hunger, can cause frequent night waking, crying. 2. Vitamin D deficiency rickets: may be related to insufficient sunlight, excessive growth rate, need to increase or diseases such as chronic diarrhea and other reasons, can cause hypocalcemia, there is increased neurological excitability manifestations, such as irritability, irritability, night terrors. 3. Pinworms: can be spread when the eggs contaminate the fingers of the affected children, eaten through the mouth, the affected children often appear perianal, perineal skin itching and sleep disturbances, can be seen insomnia, night terrors, irritability and other mental symptoms. Eight months old baby frequently waking up at night, it is recommended to timely to the hospital specialist, the doctor clear diagnosis, symptomatic treatment, in order to prevent the impact of the child’s growth and development.