People with diabetes can experience rapid jumps in weight; they may either lose a bit of weight or, vice versa, gain it in the short period. Let’s focus on losing weight first. There are two reasons which may lead to this problem in the case of diabetes. The first one is the amount of water such patient lacks. The second issue is the loss of calories in the pee without getting enough calories from the sugar in the blood. When the patient learns how to control the sugar level, the healthy weight returns.