<s>[INST] i am 18 year old female. I had abdominal pain 4 months ago . All the tests including CT scan, blood & urine test are normal. Abdominal pain now is not there but I feel vibrations in the muscle surrounding naval area which makes me uncomfortable. i have burping too . [/INST] Hi and welcome to HCM. Thanks for the query. it may be some stomach issue so beside ct scan you should do gastroscopy to rule out gastritis gerd or hiatal hernija. till that try to change your dietary habits to see will it help.Wish you good health. Regards </s>