i believe it’s an early 1980’s film I watched on my tv, the only scene I remember is mom accidentally sliced her finger cutting with a knife in the kitchen, gets a bandaid. She either checks on her kid in the living room or answered a phone call, I can’t remember. Then she cuts her hand off.
I will be impressed if you can figure that out!
Tenebre (1982)?
“Demonoid: Messenger of Death”(1981)?
Haven’t seen it, but it’s early 80s and had loads of hand violence. Click below for the trailer.
https://youtu.be/uZLWTq8QXSg