If you are older than 35 and don't get pregnant after trying for six months, see your health care provider.

If such medications don't work, however, see your health care provider.

If you ever feel something's not right with your period, see your health care provider.

If you faint, it's important to see your health care provider and find out why it happened.

If diarrhea continues after several days despite home treatment, see your health care provider.

See your health care provider if you have signs of active infection.

"All adolescents should see their health care provider at least once a year," Siegel says.

See your health care provider if you have symptoms of this condition.

You should see your health care provider every 3 months.

See your health care provider before starting treatment if you are worried.