Suggest Remedy For Bruising Around Forehead After A Fall

My 80 year old mother fell before Christmas and hit her head on the curb outside. She had bruising around her forehead and eye. She seemed fine, but in January had a strange episode with sudden onset nausea, dizziness and feeling faint. After a check up in the ER, they said it was the flu (which resolved within about 5 hours). She has seemed fine since, until today when she experienced lights flashing in her left eye and hooded vision. She saw an opthalmologist who indicated she does not have a detached retina. They are considering an eye stroke but i am concerned that this may be related to her fall and potential brain injury.