Numbness of the little finger may be caused by ulnar nerve compression, cervical spondylosis, peripheral neuritis and other reasons. 1. Ulnar nerve compression: Flexion of the elbow, osteoarthritis of the elbow joint and other causes of compression of the ulnar nerve, resulting in numbness of the little finger. 2. Cervical spondylosis: cervical spine osteophytes, herniated discs and other causes of cervical spine nerve compression, resulting in edema of the nerve root, which may lead to numbness of the little finger. 3. Peripheral neuritis: drug poisoning, diabetes, arteriosclerosis and other causes lead to peripheral neuritis, the patient manifested in the nerve distribution area of pins and needles, burning, pain and other symptoms, may also appear in the case of numbness of the little finger. In addition, carpal tunnel syndrome, poor local blood circulation and other reasons can also lead to the emergence of numbness in the little finger, it is recommended that the patient seek medical attention in a timely manner, under the guidance of the doctor to clarify the diagnosis and treatment.