In general, gallstones have the following characteristics: 1. severe pain 2. increased pain when eating 3. with fever 4. with nausea or vomiting 5. intermittent or episodic pain 6. constant pain 7. pain in the abdomen but radiating to other parts 8. pain in the middle abdomen 9. pain in the upper abdomen If you suspect gallstones, please go to the clinic for an ultrasound to clarify and then discuss treatment.