It’s sounds like you have nerve irritation somewhere between your neck and your wrist. This can be due to things like a ‘slipped disk’ in your neck, thoracic outlet syndrome or there are various sites along the arm where a nerve can get ‘trapped’.
Without more information about how the problem started, exactly which fingers are involved and some information about yourself (age etc) I can’t really give you any more information.
It’s probably best if you book yourself in for a free chat so that we can get a little more info about this and advise you better.
Give us a ring on 020 8301 5859