There are thousands of health information sites on the Internet. You will probably be able to find a site for almost any topic by using one of the 'search engines' which scan the web for sites which match your search term.
The Yahoo search engine focuses specifically on health topics at http://www.yahoo.com/health/
Another approach is to use a 'metasearcher' which combines results from several search engines. Examples include: Ask Jeeves - http://www.askjeeves.com/ and Northern Light -http://www.nlsearch.com/
No endorsement of the sites is intended by the NHS or the Centre for Health Information Quality and neither the NHS or the CHIQ carry any responsibility for their content.