You may be using too much. Once saturation occurs you should only take about 5g - 10g daily (some studies say 2g - 5g is sufficient, and only for replacement purposes)---which is best taken postworkout. Extra dextrose, phosphates, ect. (above that which is needed to facilitate absorption) may add to your bloating. Cell Tech and similar creatines prescribe wasteful usage guidelines with way too much dextrose.