Qato bisa xarin jama'a tamanin da biyar (85%) na matsalolin ciwon huhun daji ya nuna cewa shan tava na tsawon lokaci na kawo ciwon. Sa'annan 10-15 bisa xari (10-15%) matsalolin wannan ciwo ya samu ne ta rashin shan tava/sigari. Waxannan matsalolin na sa haxuwa matsalar kayyade da watsawa zuwa rado gas, asbestos, da wasu hayakin kone-kone da wasu gurvacewar iska. Za a iya ganin ciwon huhun daji kamar ciwon kirji ne idan an yi hoto aka kuma hada duba da na'ura (CT). Gwajin ta bayyanu ta bayosfsi wanda kullum ana yinta bronchoscopy ko na'ura mai kwakwalwa.