Introduction:
Physicians and representatives of health care institutions are only the second source of information on health, after the Internet, which is disturbing.

Aim:
The aim of the study was to demonstrate the relation between the occurrence of allergic diseases and searching for information about health and disease on the Internet.

Material and methods:
The study group was composed of inhabitants of Poland aged 20–44 years (n = 1728). The research tool was a questionnaire developed by the researchers, completed individually by each respondent.

Results and discussion:
Statistically relevant relations have been noticed between the frequency of searching for information about health and disease on the Internet, and the occurrence of the symptoms of allergic diseases at any time (P < 0.001), as well as the occurrence of declaring any allergic diseases of the upper respiratory track (P < 0.01). Those clinically diagnosed with asthma less often search the Internet for information about the reputation of health care institutions (P < 0.05). A statistically relevant relation has been observed between searching for information on the Internet related to the health of the respondent or the health of a family member during the last month, and declaring asthma (P < 0.05).

Conclusions:
The occurrence of allergy symptoms influences the frequency of searching the Internet for information about health and disease of a respondent or a family member, about health protection or medical services.