PJ syndrome mainly includes the following symptoms: a. PJ syndrome, also known as hyperpigmented dark spot polyp syndrome, is hereditary and occurs in the gastrointestinal tract, with symptoms similar to those of other gastrointestinal disorders, including recurrent abdominal pain and bloating, possibly accompanied by bloody stools, and the classic clinical symptom of dark skin patches on the lips, cheeks, and ends of the limbs, which usually appear in childhood and fade in middle age. They usually appear in childhood and gradually subside after middle age. Second, gastrointestinal polyps are usually located in the jejunum and ileum, which may cause intussusception or intestinal necrosis, with clinical manifestations of abdominal distension, abdominal pain and intestinal obstruction. The above are the specific symptoms of PJ syndrome, it is recommended that if the above symptoms occur, patients should go to the regular hospital in time for relevant examinations, under the guidance of the doctor to use the appropriate way of symptomatic treatment.