<s>[INST] I have a daughter who is 13 years of age. She has really bad abdominal pain in the same area of her apendix and has really bad headches, she is also experiencing blood in her stools. She said if she had to rate her pain on a scale of 1-10 it would be an 8! What could this be? [/INST] See lower abdominal. Pain can be due to appendicitis,amebiasis,renal colic,gastities,ulcers,piles,She also has history of blood in stools,is it frank or mixed with stool???,it needs to get evaluated,due to loss of blood anemia  occurs and that is most probably cause of her headache,I recommend you to take an surgeons opinion on it. </s>