Acute

Dictionary Definition:

adjective

1

a(1)

: characterized by sharpness or severity of sudden onset

acute pain

(2)

: of rapid onset and relatively short duration

acute illness

 see also acute disease

(3)

: being, providing, or requiring short-term medical care (as for acute disease or traumatic injury)

acute hospitals

an acute patient

b

: lasting a short time

acute experiments

~ merriam-webster