My muscles in my back or side keep locking up when I stretch or bend. I have not pulled any muscles lately. I thought it might be from dehydration but I am drinking plenty of water. Thought maybe potassium levels might be low but I am eating at least 4 bananas a week. I am T2 diabetic but my BS levels have been within good ranges. This is happening a few times a week and the pain is excruciating.