It's the second time in a month that my face tingles for a few hours randomly. what could it be? don't think calcium deficiency, i drink lots of milk

See a neurologist: for neurological examination and imaging to rule out trigeminal neuropathy or other pathology in the posterior fossa. Take care.

Follow it: Calcium defiency won't do this. Hypocalcemia from real tetany will affect your lips and fingers. I trust you are not hyperventilating. Make a note of whether it's one side or both, what the distribtion is, identify any triggers, and if it gets worse or there are new symptoms, get seen.