hysteria
Medical and general term for uncontrollable emotional outbursts or psychosomatic symptoms. Often used in everyday language to describe someone being overly dramatic or emotionally unstable.
from German Hysterie
She had a fit of hysteria and screamed and cried.
Psychotherapy can be effective for hysterical symptoms in some cases.
She had a hysterical fit over something trivial.
Lately my mother has been on edge and easily angered.