Five-month-old babies who sleep at night and wake up during the day to play with their necks and heads stretched backward may or may not be normal, such as cerebral palsy, traumatic brain injury, and so on. 1. Normal phenomenon: Eczema can cause itching. If the eczema grows on the back of the neck or the back of the neck, the baby will relieve the itching by stretching his neck and head backward to produce friction. In addition, by the influence of the surrounding environment, the baby imitates other people or simply in the play will also appear this phenomenon. 2. Abnormal: (1) Cerebral palsy: cerebral palsy, also known as cerebral palsy, is a brain injury caused by various reasons, which will result in backward motor development and abnormal muscle tone, mainly manifested as a markedly elevated muscle tone, and the affected children will have their necks and heads tilted backward, which is usually accompanied by symptoms of growth and developmental delays. (2) Traumatic brain injury: If there is a recent fall, the brain tissue damage will lead to upper neuron damage, the dystonia will be elevated, and it will also be manifested as the habit of stretching the neck and head backward. Five-month-old baby sleep at night woke up during the day to play the habit of neck head backward tilt should be more observation of the baby’s other symptoms, you can go to the hospital for examination, to rule out the cause of disease.