The following are some helpful medical sites that contain valuable medical information and health advices.
Medlineplus
http://medlineplus.gov/
The premier consumer health information site from the National Library of Medicine. It should be the first stop for all your consumer health questions.
Healthfinder
http://www.healthfinder.gov/
This site is produced by the U.S. Department of Health and Human Services, and provides links to reliable health information.
NOAH: New York Online Access to Health
http://www.noah-health.org/
Provides links to high quality health information that is specifically written for consumers seeking health tips.