Hello, it is normal to have a stomachache or defecation reaction after using Belle, an old Beijing foot patch. You can try to observe the color. After using it for about 15 days, the defecation will be dark or black at first, and the color will change to banana color after 2-3 days, which is not sticky or slippery. This is an effect of detoxification. The stool in the body is attached to the intestine for a long time and is toxic. Girls have acne, spots or dull skin.