I lost my sense of smell after a mild concussion with no fracture, just a bruise and bump. will it return? please help! thank you!

Concussion: Loss of smell is fairly common after concussions. Often there is a fracture through the cribiform plate (which can be hard to visualize on a CT scan of the brain) or shearing of the tethered olfactory tract. Generally the sense of smell remains diminished and likely will not improve after six months from the time of the head trauma.

Perhaps: Working with the olfactory sense and retraining it can help. Begin with familiar scents to help stimulate the olfactory receptors.