... for example, ginger has been used to aid digestion and treat stomach upset, diarrhea, and nausea for more than 2,000 ... . Since ancient times, ginger has also been used to help treat arthritis, colic, diarrhea, and heart conditions. In addition to ... is commonly recommended by health care professionals to help prevent or treat nausea and vomiting associated with motion sickness, pregnancy, and cancer ...