What to do if my finger numbness and discoloration?

Warm finger: One of the few things that will cause finger discoloration (either paleness or bluish color) is Raynaud's Phenomenon. THis is due to a spasm of the arteries going to the fingers or hand. It can be triggered by exposure to cold and sometimes stress. If it is infrequent, just try warming your fingers with warm water, but it occurs very often check with your doctor.