I m wanting to know what could be causing a dull ache, mid upper left side of my abdomen, felt also on my side. I have had this for some time,2 to 3 years. Thought it was lying on my right side at night which I favour, however it feels like a stitch which has me rubbing my hand over it as its there a lot. I have a not so good back which I have thought to be related. My bowel is inclined to be sluggish, but my normal diet is a healthy one with very little sugar and few fats. Any clues, RA