Hi and welcome to HCM. Thank you for your query.
It has nothing with brain. this is probably caused by trigeminal or facial neuralgia
which is common and the exact cause isnt found yet but it is considered taht it may be triggered by some infection, cold whether, stress
or food. Also, this can be one type of migraine
. You should take nonsteroid painkillers, avoid noise and lights and wind, rest in dark room,take enough fluids and if it progress or perists you should visit neurologist
. Wish you good health.