Common cold, sinusitis, ear infection, sensory nerve compression, peripheral neuropathy as in diabetes, inflamed wisdom
tooth, impacted
wisdom tooth etc can all cause facial numbness and pain. Hemi-facial numbness is also seen in Bell’s palsy, trigeminal neuralgia where a spasm may cause numbness, or due to acoustic neuroma which is a benign tumor of the eighth cranial nerve.
I think you should discuss these possibilities with your doctor.