Diarrhea can be of sudden onset and lasting for less than four weeks (acute) or persistent (chronic). This leaflet deals with acute diarrhea, which is common. In most cases, diarrhea eases and goes within several days but sometimes takes longer. The main risk is lack of fluid in the body (dehydration). The main treatment is to have lots to drink, which aims to avoid dehydration. You should also eat as normally as possible. See a doctor if you suspect that you are dehydrating and any serious symptoms. take electrol powder