I have had LUQ spasm with pain. It feels like I have a knot that tightens like a Charlie horse under my left rib cage. It can be very painful and last 10-30 min. It is sometimes positional, sometimes not. Sometimes it is accompanied by heartburn, sometimes not. I am 58, morbidly obese and am diabetic
Ok, depends how deep down it is. If it is on the surface, it is obviously the abdominal wall muscles, Hernia, tight clothes, electrolyte abnormalities, or just diabetes can make this more common. If it is NOT on the surface, there are a lot of upper gastrointestinal problelms such as reflux that are very common in diabetes and/or obesity.