Health officicals have confirmed a fourth flu-related death in Sacramento County.  If you're not feeling well, it would behoove you to be able to tell whether there's reason for concern.

The most recent casualty, a 46-year old man, died from the H1N1 virus, commonly known as "swine flu," which is the most common strain this year.

UC Medical Center's Dr. Dean Blum-berg says the swine flu typically comes on quickly,

"...all of a sudden you are sick, you've got high fever, your muscles ache, and then you've got respiratory symtpons such as the coughs and fever."

Even so, Dr. Blumberg says it's very difficult to tell if it's actually H1N1 or a different strain by the symptoms alone.  Doctors, in fact, have to make the determination through a lab analysis.

If you do have flu-like symptoms and are also having trouble breathing or are short of breath, experiencing dizziness and confusion, or have chest pain or pressure, it's important to seek medical attention immediately.