Whether your body dehydrates from diarrhea or any other stomach-related disease, you should consider the intravenous method to hydrate your body at a fast rate. You may consume water and oral rehydration fluids. However, oral fluids enter your stomach first and then spread to other parts of your body. Hence, they can only satisfy your thirst and hydrate your body slowly. If you want to get fast relief, you must undergo an IV Hydration Therapy procedure.