My lips and left fingertips are numb....what are possible causes? they stay numb but have no other noticable changes.

Numbness: The possibilities are too numerous. An adequate history and physical examination performed by your physician would help him to narrow down the possibilities. I always look for vitamin B12 and blood sugar disorders. Carpal tunnel syndrome, neck conditions, brainstem demyelinating or structural disorders, and less likely stroke or tumors. Check with your physician for actuate diagnosis. Be well.