A bacterial infection may develop following infection with viral
influenza. Signs of a bacterial infection
pain that lasts more than 24 hours or severe ear pain that lasts longer than 1
A sore throat that lasts longer than 2 to 3 days despite home
treatment and does not "act" like a cold.
Sinus pain that persists
despite 2 to 4 days of home treatment, especially if nasal drainage is colored
rather than clear and fever is also present.
Nasal drainage that
changes from clear to colored after 5 to 7 days of flu, while other symptoms
(such as sinus pain or fever) are getting worse.
A cough that
lingers more than 7 to 10 days after other symptoms have cleared, especially if
it is bringing up mucus (productive).
Yellow, green, rust-colored, or bloody mucus that
is coughed up from the lungs, especially while other symptoms are getting
worse. Mucus coughed up from the lungs is a more serious symptom than mucus
that has drained down the back of the throat (postnasal drip).
These infections may sometimes need treatment with
How this information was developed to help you make better health decisions.