Four in five Internet users have searched the Web for health care information, most often checking on specific diseases and treatments, a Pew Internet Project survey reported on Tuesday.

Women were among the most frequent seekers of health information, especially those who have children or keep watch on behalf of relatives and friends. Adults with at least some college education and younger adults were also big users, Pew said.

Sixty-six percent of Web users looked for information about a disease or medical problem, the survey found. For example, it noted, the top five conditions searched for on WebMD, one of the most frequently visited sites, were shingles, gallbladder, gout, hemorrhoids and lupus.

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