See doctor's answer to my question under PAD (peripheral arterial disease)
How are you?
Tingling numbness in the little finger can be an early sign of cubital tunnel syndrome. In this syndrome there is ulnar nerve entrapment which causes tingling numbness in the little and ring finger.
Other causes can be diabetic peripheral neuropathy or peripheral neuropathy due to vitamin B12 deficiency.
Please get your self evaluated by a neurologist. Take care!