Hi. Thanks for your query and proper history. I can understand the plight the child and you must be going through. Your daughter is just 5 years old and hence the causes of pain in the abdomen for the past 2 years can be as follows. The most probable cause of pain in a child -Tummy tonsils- meaning enlargement of the lymph nodes of the abdomen. -Appendicitis- by default this has to be ruled out in every case of pain in -abdomen of a child. -Worms. The best diagnosis is a high resolution ultrasonography. some blood, urine and stool tests. A therapeutic trial with a course of an antibiotic, metronidazole and probiotics under the guidance of a pediatrician / Surgeon always helps to solve the problem and to get a diagnosis. Also given is a dose of medicines active against worms in intestine. I hope a consultation with a Pediatric Surgeon, investigations and a course of an antibiotic and metronidazole should solve the problem. If this is indicative of appendicitis , please go for the surgery of appendectomy.