The baby sleeps with sound and also makes force, the following conditions are common: 1, vitamin D deficiency rickets, the baby will show a red face, breath-holding-like episodes, accompanied by excessive sweating, occipital baldness, night terrors, night crying and other symptoms. The baby will show increased involuntary movement of the limbs, accompanied by asymmetrical twisting of the body, increased or reduced muscle tone of the limbs. 2. It will also be accompanied by head tilting back, body jerking, and the presence of high-risk factors before, during or after birth, such as prematurity, hypoxic-ischemic encephalopathy, nuclear jaundice, etc. If you have any of these manifestations and medical history, you should visit the hospital promptly.