<s>[INST] I am a 28 year old female and have a dull ache in my lower right abdomen. It is just to the right, below my belly button. I get a small bulge that goes up and down after I eat dinner, before I go to bed and am lying down. It feels somewhat like a gas bubble but only lasts for a few seconds and happens a couple of times.This doesnt happen any other time of the day (only at night) but I feel some pressure on the spot during the day. I have loud gurgling noises and I feel some pulsing when it is happening.I had a neurofibroma tumor removed from my spine 15 years ago. Do you think it is a tumor growing back? Or Irritable bowel syndrome? [/INST] HI. This is not a tumor growing back or Irritable Bowel Syn Chat Doctor. This is a form of an intestinal obstruction. Easily confirmed by a Standing X-ray abdomen when you have this attack (if possible as this lasts for a small-time). The best way is to request for a diagnosis called Enterocolitis (barium contrast study) and/ or a Contrast enhanced CT Scan... The treatment can be decided on actual findings. </s>