Is a stomach ache always a sign of the flu?

No. Abdominal pain has many possible causes. GI symptoms can occur with a viral gastroenteritis (stomach flu), H1N1 (bird flu) and it is more likely for a child to present with GI symptoms than an adult for classic influenza.

Related Questions

Could the flu shot cause a stomach ache?

Influenza Vacccine. Stomach Ache was not listed on any of the articles that I reviewed. The flu shot has inactivated virus- so it will not infect you with the flu. If you have reactions to the shot they usually resolve within one to two days. Side effects can include a low grade fever, aches & pain, and localized swelling, redness and pain at the shot site. Some people have had allergic reactions to the flu vaccine. Read more...