Fever and Chills

• According to MedicineNet.com a stomach virus is often accompanied by chills and a low-grade fever. A fever presents itself when the body's temperature rises one degree above the normal; which is 98.6 degrees Fahrenheit (F). A fever is the body's way of fighting infection. A fever aids the immune system in combating viral infections, while chills help to cool the body back down.
  
  

Nausea and Vomiting

• The development of nausea and vomiting can be a tell-tale sign that the body is fighting a stomach virus. The University of New Hampshire Health Services explains that a patient with a stomach virus should not eat or drink until these symptoms have subsided; clear liquids should be re-introduced within two hours following their absence. Nausea and vomiting that has not diminished within the first 24 hours of the stomach virus' onset should be treated by a doctor.
  
  

Stomach Cramps and Diarrhea

• According to the MayoClinic diarrhea is one of the main symptoms associated with a stomach virus. In most cases the diarrhea is accompanied by stomach cramps that can range in intensity between mild and severe. The diarrhea symptoms often last longer than stomach virus itself; in some cases remaining watery for up to two weeks after the stomach virus ends. Diarrhea symptoms that linger longer than two weeks are cause for concern and need to be addressed by a physician.
  
  

Fatigue and Muscle Aches

• The combination of fever, chills, nausea, stomach cramps and diarrhea can take a large toll on the body. In fact, for some stomach virus sufferers the illness can be completely overwhelming; resulting in muscle aches and fatigue. For some, the fatigue that is associated with a stomach virus may seem to stick around longer than expected and abc News Health reveals that there may be a good reason as to why. Researchers have found a link between stomach viruses and chronic fatigue syndrome (CFS); a condition that can be quite debilitating. Unfortunately, there is no cure for CFS only medications to treat the symptoms.
  
  

Dehydration

• Dehydration occurs when the body lacks sufficient amounts of water and electrolytes, and serious health risks can develop if these items are not replenished. The National Digestive Diseases Information Clearinghouse (NDDIC) reports that the excessive vomiting and diarrhea that is associated with a stomach virus can lead to dehydration. Therefore, it is imperative to seek medical attention if dry mouth, extreme thirst, dizziness, or a decrease in urine or tears develops. Any of these symptoms can be indicative of dehydration.