Tingling on 1 side of upper lip for few days now tingling on lower lip for a couple days. what could this be?

Could be tingling: The face up to the hairline, the inside of your mouth back to the gag-zone, the anterior tongue, your meninges, your eyes, & a little patch of skin in your ear canal, all send sensory input to the trigeminal nerve. The problem could be from the distal branches at the lip over the twists & turns of the nerve to the trigeminal nucleus in the brainstem. That's the part your doctor has to figure out.

Early fever blister: Fever blisters often begin with tingling then pain. Try OTC fever blister medicine or see your Primary Care. Thanks for trusting HealthTap!