Ciwon kwakwalwa shine "ciwon intracranial wanda aka samo shi ta hanyar rarraba tantanin halitta mara kyau da rashin kulawa a cikin nama na kwakwalwa kuma yana iya haifar da mutuwa sai dai idan an yi nasarar magance shi." Mahimmanci, girma ne mara kyau ko yawan ƙwayoyin sel a cikin kwakwalwa wanda zai iya tsoma baki tare da aikin kwakwalwa na yau da kullun kuma yana iya zama barazanar rayuwa idan ba a gano shi da kyau ba kuma ba a kula da shi ba.