Accompanying Symptoms. You can usually determine that your aching teeth are related to the flu and sinus rather than dental care by looking out for other symptoms. Sinus toothaches usually come with tenderness in the cheekbone and gums, throbbing headache, fatigue, and a runny nose.nlike a common cold, the flu is caused by an influenza virus that infects the airway tract in the nose and throat. Symptoms of the flu can include fever, weakness, coughing, headache, and achesâsometimes even in the teeth. 1  Things That Make Toothaches Worse. 2  How to Alleviate Tooth Pain Caused by Sinuses.
1 Rotavirus. 2  Symptoms of rotavirus â the leading cause of viral gastroenteritis in infants and young children â usually appear one to three days after exposure. 3  But you're contagious even before you develop symptoms, and up to two weeks after you've recovered.he contagious period â the time during which a sick person can give the illness to others â is slightly different for each virus. 1  Norovirus. 2  With norovirus â the most common cause of viral gastroenteritis in adults and children â you're contagious from the moment you begin to feel ill.
A virus causes stomach flu or gastroenteritis. The most common viruses are rotavirus or norovirus. Symptoms appear one to three days after exposure to the virus. You are contagious before you even begin to develop symptoms. Even after youâve recovered from your symptoms, you can remain contagious for up to two weeks.hen you have the stomach flu, you can take medication, but you should do so sparingly. If you have a fever, headache, or muscle aches, ibuprofen can help, as long as it doesnât cause you to have more of an upset stomach. Taking it sparingly with food is usually the best approach.