Could be Raynaud's syndrome. It's a vasomotor response caused by a problem with the sympathetic nervous system. Are your fingers turning blue or red? That is a key sign. It could be a circulation issue. Otherwise it just might be normal for you. If you're female it is more likely to have cold hands because your body will store heat in your core unlike men who are more evenly warm. If its really bothering you, check with a doctor.