How Can Numbness In The Finger After Injury Be Treated?
May persist
Detailed Answer:
I read your question carefully and I understand your concern.
From what I understand it is 4 months now since the traumatic event. That amount of time should be more than enough for an injury due to the tight wrapping to heal, usually most improvement happens during the first 3 months. The fact that the symptoms persist indicates that there may be an permanent injury to a peripheral branch of the ulnar nerve which supplies that area which the more the time passes the less likely it is to heal by itself. It may be due to a direct damage by the cut.
So yes you should see a hand specialist, although that is more for the purpose of excluding other possible causes, such as compression due to a fracture, neurinomas etc. If the lesion is confirmed to be directly due to the cut I am afraid there is not much that could be done to revert it.
I remain at your disposal for other questions.