Acute cholecystitis will have severe pain, chronic cholecystitis will have hidden pain. 1. Acute cholecystitis: Acute calculous cholecystitis usually occurs at night, starting with distension and discomfort in the epigastric region, then gradually developing into paroxysmal colic, and radiating to the right shoulder, scapula and back when the pain is more intense. As the disease progresses, the pain is persistent and gets progressively worse. Acute non-calculous cholecystitis can also be characterized by severe pain, chills and high fever. 2. Chronic cholecystitis: Chronic cholecystitis is usually a vague pain, especially after a full meal or eating greasy food, the epigastric distension discomfort, the degree of pain varies from person to person, some are slightly lighter, some will be slightly heavier. It is not possible to diagnose cholecystitis on the basis of the symptom of pain. If you suspect cholecystitis, you should go to the hospital in time to confirm the diagnosis based on a combination of symptoms, blood tests and imaging tests.