Wiktionary
cyberchondria
n. anxiety concerning one's health caused by visiting medical websites
Wikipedia
Cyberchondria
Cyberchondria is the unfounded escalation of concerns about common symptomology based on review of search results and literature online. Articles in popular media position cyberchondria anywhere from temporary neurotic excess to adjunct hypochondria. Cyberchondria is a growing concern among many healthcare practitioners as patients can now research any and all symptoms of a rare disease, illness or condition, and manifest a state of medical anxiety.