Itchy whitish bumps/streaks btwn knuckles back of pinky finger for months, noticed a new similar streak on ring finger. Wart stuff does nil. Whats up?

They aren't warts. See a dermatologist for evaluation and recommendations for care.
Bec not wart. Sounds more like eczema or an allergic reaction to something. Try Hydrocortisone cream over the counter. If it doesn't work see your doctor.