Piriformis syndrome is a syndrome caused by the sciatic nerve compression, the main clinical manifestations of hip pain and lower limb radiating pain, symptoms worsened in the morning, may be improper sleeping posture, cold, get up too hard and other factors. 1. Improper sleeping posture: incorrect posture at night, resulting in the pyriformis muscle area is subjected to prolonged pressure, nerve compression symptoms will be aggravated, in the morning when you get up, buttock pain and lower limb numbness symptoms will be aggravated. 2. Cold: because of sleeping at night or waking up in the morning, do not pay attention to body warmth, hip cold stimulation, local muscle spasm contraction, aggravate the sciatic nerve compression symptoms, hip pain aggravation phenomenon. 3. Wake up too hard: get up too fast in the morning, too hard, will also lead to pear-shaped muscle syndrome aggravation, after reasonable rest may reduce the symptoms. Piriformis syndrome symptoms worsen in the morning when getting up, if the duration is long and not improved in time, it is recommended that the patient consult a doctor in time for examination and standardized treatment.