震える舌 - Writhing Tongue
One of the most harrowing films I've seen in a long while! A young child contracts tetanus after cutting her finger when playing outside. Thus begins her long and painful downward spiral of relentless seizures and blood curdling screams, as her parents watch on helplessly, while also fearing they may have also contracted the disease.
Not a horror movie per se, but more horrific than most. Highly recommended if you can find a copy!