Reiter's syndrome, wanda kuma aka sani da ciwon sanyi na reactive, nau'in arthritis ne na kumburi wanda zai iya shafar haɗin gwiwa, idanu, da kuma urinary fili. Yawanci yana faruwa bayan kamuwa da cuta a wani sashe na jiki, kamar fitsari ko gastrointestinal tract. Yanayin yana da alamun bayyanar cututtuka kamar ciwon haɗin gwiwa, taurin kai, da kumburi, da kumburin ido da alamun urinary fili kamar konewa ko rashin jin daɗi yayin fitsari.