The symptoms you feel may be a signal that your problem is getting worse, not better. Neglecting treatment may cause your condition to spiral downward. You could end up with even more pain and weakness. A bigger concern is that the pressure on the nerve can cause the muscles of the palm and thumb to weaken and shrink (atrophy).
Left untreated, the pain, numbness, and weakness will likely get worse to the point that you are challenged when using your hand for daily activities. Starting treatment before the problem “gets out of hand” will improve your chances of getting better and avoiding surgery.