3-year-old baby does not sleep at noon may be usually too long sleeping time, the environment is too noisy lead. 1. sleeping time is too long, if the baby sleeps for a long time every morning, may not want to sleep at noon symptoms, this situation is generally more normal. 2. The environment is too noisy, if you often let the baby in too noisy environment or strong light, may affect the baby to fall asleep, so there will be a baby does not sleep at noon symptoms. Usually must observe the baby’s situation, the midday does not sleep on the baby’s body basically will not have a great impact, as long as the mental mood is normal. If you find that there is a disease, it is best to seek medical treatment in a timely manner.