Why do my hands and wrist hurt before and after i breast feed? it feels like a numb tingling feeling. they feel heavy and extremely weak.

Are you using a : Boppie for support & resting your forearms on the padded arms of a rocking chair? Somehow your position is pulling on the roots of nerves to these areas in your neck or you're developing thoracic outlet syndrome ( pinching of nerve, vein & artery bundles as they leave your thorax, or chest). Other neurological disorders are less likely, but a neurologist can diagnose any or all of these.