Had this problem. It was ulnar nerve compression in my back from poor posture. Left it for ages and have reduced sensitivity in my ring and pinky on both hands

Had this problem. It was ulnar nerve compression in my back from poor posture. Left it for ages and have reduced sensitivity in my ring and pinky on both hands. Physio therapy, Laptop stand, external keyboard, mouse, good chair and foot rest help a lot + a tonne of rest. Stretches and general core strength helped a lot too. Running and lifting weights. I can still type. It’s a gift. I try not to take it for granted and count every day I can still use a keyboard.