Numbness of the small fissure of the palm may be caused by trauma, cervical spondylosis, peripheral neuritis, diabetic peripheral neuropathy and other factors. 1. Trauma: Knock or sharp instrument injury to the palm of the small fisheye can lead to the small fisheye local or ulnar nerve and other innervating nerves damage, resulting in small fisheye pain, numbness and other dysfunctional manifestations. 2. Cervical spondylosis: long-term low head work, play cell phone, improper neck posture, can trigger radicular cervical spondylosis, resulting in local nerve root compression, can cause pain, numbness and other symptoms in the area of piriformis. 3. Peripheral neuritis: peripheral neuritis can occur due to nerve compression diseases, medication factors, etc., which can lead to peripheral nerve damage, causing numbness and discomfort in the pisiform area. 4. Diabetic peripheral neuropathy: diabetic blood glucose level long-term control is not good, the longer the course of the disease can cause peripheral neuropathy, resulting in damage to peripheral nerves, the local blood circulation is not good, can appear in the small fish head pain, numbness and sensory abnormalities and other manifestations. The above are only some of the common causes. When the numbness of the small fishbone of the palm should be timely medical consultation, under the guidance of specialists to actively carry out appropriate treatment, which will help to alleviate the discomfort symptoms as soon as possible.