Background: Today osteoarthritis is considered a public disease, meanwhile good health literacy is directly connected to high quality of life. This study examines how this can be worded in posts online and in texts from two different health care institutions websites. Purpose: To differentiate between how complaints of osteoarthritis is worded by health care institutions, in this case 1177.se and Kry.se, versus posts online made by private persons. Method: SFG together with a transitivity analysis, where extra focus was on processes, participants, and circumstances. Results: The complaints are more commonly worded as materiel processer and with more explicit participants in the texts collected from the health care institutions and in the online posts there were more of both materiel and relational processes and the participants can sometimes be implicit.