痛み止めの注射をします。

Meaning
i'll give you a pain stop

Vocab used in this sentence

痛み
pain, ache, sore, painful, damage, smart, grief, distress, bruise, soreness
止め
stop, end, unstoppable, halt, cease
to, of
注射
injection, injected, shot, vaccination, syringes
o, the, to, wo
and, shi, four, death
ます
will, to be, i will, to make, to do, to have