By far, this is the most common sign you could have with food poisoning. Diarrhea is an unpleasant and often unexpected situation that could cause you to remain near a bathroom, just in case something happens. Food poisoning is an infection of your body from a foreign invader and typically your stomach, colon, and intestines are attacked as a result. When your colon and intestines are attacked, your gut flora becomes disturbed and soon bad bacteria begin to invade the area. The body recognizes this and activates a defense mechanism to quickly eliminate the bad bacteria from your body and the result is a bout of diarrhea.
Following diarrhea, one of the most common side effects is dehydration. Dehydration is a process in which the body is low on volume, mostly water and it is often a result of diarrhea. If you have diarrhea and are feeling thirsty then there is a good chance that you are dehydrated and it is important to slowly drink water or sports drink to aid your rehydration. If you have diarrhea for more than the usual day or two, it is important that you see your doctor and be evaluated so that you can have the proper treatment to rid your body of this foreign invader.