How long it takes for a three-month-old baby to recover from anorexia is mainly related to the cause of anorexia and individual factors, and should be analyzed on a case-by-case basis. If a three-month-old baby’s anorexia is due to physiological reasons, it can generally be recovered in a week or so. It is recommended that parents try to choose a quiet environment and feed their babies a few times to help them regain their appetite. If the anorexia in a three-month-old baby is due to pathological reasons, such as gastrointestinal diseases or other diseases, the baby may have abdominal distension, indigestion, anorexia, lethargy and other symptoms, parents are advised to take the baby to the pediatric gastroenterology department of a regular hospital in a timely manner to clarify the cause of the disease and then carry out symptomatic treatment. The symptoms of anorexia can be restored after the cause is eliminated, but the exact time varies from person to person. During the period of anorexia, parents should avoid forcing the baby to eat and suggest appropriate vitamin supplementation. Appetite-promoting drugs can be applied if necessary.