Intussusception in infants initially manifests as vomiting, including the contents of the stomach and sometimes even a coffee-colored liquid. Subsequently, the infant may appear inconsolably fussy and experience abdominal pain, which is communicated through crying, as infants are unable to speak. Additionally, the stool may appear like jam or contain pus and blood, which is due to bleeding from the intestinal mucosa and intestinal tubes. Upon observing these symptoms, it is crucial to seek medical attention promptly and conduct further examinations at a hospital, such as an abdominal ultrasound and an upright abdominal X-ray, to confirm the diagnosis.