Hi, Numbness in the hands and fingers may be as a result of a compression of a nerve (most commonly as it exits from the neck or any where along it s course like at the wrist) or a neuropathy as a result of a systemic disease like Diabetes or thyroid disfunctions especially when it is uncontrolled. With increasing use of hand held devices such as smart phones or tablets, there has been an increasing incidence of carpal tunnel syndromes and cervical radiculopathies. You may consult a Neurologist or an Orthopedic surgeon to arrive at a proper diagnosis and effective treatment thereafter. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. John Chacko, Orthopedic Surgeon