Infants who cry for a long time have certain effects on the body, such as hoarseness and flatulence, etc. It is important to pay attention to the causes of crying (e.g. intussusception, etc.) and intervene at the same time. 1. Infants can express their demands through crying, such as hunger, feeling uncomfortable, etc. Crying for a long time may have certain effects on the body, such as spitting up and choking when breastfeeding due to inhalation of more air by the infant during crying, or intestinal distension, causing abdominal discomfort to the baby, etc. Some infants may have hoarse voice due to prolonged crying. 2. Infants with prolonged crying usually need to pay attention to whether there is a special reason, such as insufficient feeding, need to increase the amount of feeding, or wearing a cause of discomfort, parents need to be carefully examined. 3. If the infant is in a state of illness, such as intussusception, the infant may have paroxysmal crying, often more intense crying, may be accompanied by spitting up, jam-like stools, need to actively seek medical attention. Some infants may have fever, and the discomfort caused by the fever may lead to the above symptoms. It is necessary to consult the doctor to identify the cause of the fever and to treat it. If an infant cries for a long time, it is recommended that he or she be seen by a specialist for evaluation.