Pain inside the navel, clinical common appendicitis, colitis, ascariasis, umbilical cord inflammation, umbilical hernia and other diseases, the specific causes, need to be combined with the results of the patient’s examination to further analyze. 1. Appendicitis: in the early stage of appendicitis, patients can have pain around the umbilicus, with the development of the disease, the pain is usually fixed and transferred to the right lower abdomen, in addition to pain, appendicitis patients are often accompanied by high fever, fatigue, nausea, vomiting and other symptoms. 2. Ascariasis: this disease is usually seen in children, roundworms are mainly parasitic in the intestines, mostly in the colon and rectum, early symptoms are atypical, and the middle and late stages can cause abdominal distension, abdominal pain and other symptoms, and if the roundworm larvae invade into the lungs, it may also lead to high fever, coughing, coughing up blood and other symptoms. 3. Colitis: the umbilical cord is usually the part where our colon is located, if persistent pain around the umbilicus, consider the possibility of colitis. The common clinical manifestations of patients with this disease are abdominal pain, diarrhea, etc., when the condition is serious, it can cause pus and blood stool, fecal incontinence and other symptoms,. 4 umbilical cord infection: umbilical cord infection can be divided into acute and chronic, acute can be manifested as periumbilical abscess, umbilical fossa moist, accompanied by purulent secretion, periumbilical pain, can be feverish performance. Chronic umbilical infection can be manifested as periumbilical granuloma and eczema-like changes. 5. Umbilical hernia: an extra-abdominal hernia in which the contents of the abdominal cavity protrude from the umbilical area of weakness. When an umbilical hernia becomes incarcerated, the mass cannot be retracted, and can cause severe pain and vomiting. The pain inside the navel may also be other causes, it is recommended to go to the hospital in time, further improve the abdominal ultrasound, CT or endoscopy, in order to clarify the diagnosis and treatment.