Background: Online health information seeking is prevalent among patients nowadays and this might influence the medical consultation outcome and affect the patient-doctor relationship. Objective was to determine the prevalence of online health information seeking behavior among primary care clinics attendees in Bahrain and the impact on patient-doctor relationship.Methods: Patients attending primary care clinics in Bahrain were asked to complete a previously adapted self-administered questionnaire that studied demographical data, frequency of online use in general and for health-related information and pattern of online health information seeking including reasons searched for and sources used. The logistic regression analysis done to explore respondent’s characteristics with health seeking behavior online.Results: Ninety-seven percent (97%) of the study population used the internet and (94.7%) had searched for online health information. The two main types of information sought were disease-related information (88.7%) and complementary and alternative medicine (55%). Fifty-three percent used reliable sources (i.e., Ministry of Health (43.3%), hospital websites (14.9%), medical encyclopedias (e.g., PubMed and Medline plus) (17.4%).  Approximately (39.3%) use social networks to find information (including Facebook and Twitter). Convenience and usability were the main reasons (88.9%). Fifty-five percent (55%) asked or shared health information they found online with their doctor.Conclusions: Online health information seeking is highly prevalent in Bahrain among primary care clinic attendees. Sources were chosen mainly for their convenience, availability and being easily understood. A good number shared health information found online with their physicians. Physicians should be aware about patients’ online health seeking behavior and address that during consultation.