Term for someone worried about health after reading health information online

Solution 1:

It's called cyberchondriasis - combination of cyber and hypochondriasis.

http://www.ncbi.nlm.nih.gov/pubmed/22137465

A type of hypochondriasis that develops in a person who, while on the Internet, identifies one or more personal symptoms—e.g., tachycardia, dyspnea—and ties that to one or more conditions; the individual then convinces himself/herself that he/she is suffering from these conditions (freedictionary).

Solution 2:

That person would be a hypochondriac.

The persistent conviction that one is or is likely to become ill, often involving symptoms when illness is neither present nor likely, and persisting despite reassurance and medical evidence to the contrary. Also called hypochondriasis. 2. Plural of hypochondrium.

If you fear that you might be a hypochondriac then click here.