Crying is a way for infants to express their demands, feelings or pain. Infants are often seen clinically for crying and fussing. There are many causes of crying and fussing in infants, and they are generally divided into two categories: non-disease crying and disease crying. (1) Non-disease crying and fussing (1) Hunger, defecation, urination. (2) Excessive cold, excessive heat, body position discomfort. (3) local stimulation, such as insect bites and other external stimuli. (4) Need to hold, coax, change of living habits, etc. 2.Characteristics The cry is loud and strong, without fever and other accompanying symptoms, and no longer cries when its needs are met or the adverse environment is improved. (2) Disease-related crying and fussing 1. Respiratory system diseases Fever, cough, runny nose, hoarseness, breathing difficulties, and history of foreign body inhalation may be present. 2.Digestive system diseases Diet, vomiting, diarrhea, abdominal distension, abdominal mass, incarcerated hernia, when there are intermittent paroxysmal crying, pay special attention to the occurrence of intestinal entrapment, intestinal torsion. 3. Urinary system diseases Whether there are urethritis, cystitis, urinary stones, etc. 4.Intracranial diseases There may be paroxysmal screaming, jet vomiting, pay attention to the occurrence of meningitis or intracranial hemorrhage, etc. 5, nutritional diseases rickets, anemia, etc. 6, other such as dermatitis, limb injury, etc. Clinical experience 1.Inquire and observe the time of crying and fussing, the nature of crying and fussing, the relationship between crying and fussing and the accompanying symptoms during crying and fussing, etc. 2.Conduct a detailed physical examination of the child, including measurement of body temperature, respiration, pulse, and examination of the whole body surface, head and neck, pharynx, heart and lungs, abdomen, and extremities. 3.Consider some kind of reason for non-disease crying and quarreling, give appropriate soothing measures, observe whether the crying and quarreling can be relieved, and pay attention to whether other abnormalities appear. 4. If you do not rule out a disease that causes crying and fussing, give appropriate auxiliary tests, such as routine blood, urine and stool tests, X-rays, ultrasound and other tests. Clearly diagnose and treat.