Numbness of the ring finger at night may be related to the pressure on the ring finger, or it may be caused by cervical spondylosis, diabetic peripheral neuropathy and other reasons. 1. Pressure on the ring finger: When sleeping at night, if you keep an improper posture for a long time, resulting in prolonged pressure on the ring finger, which affects the blood flow of the ring finger, it may cause numbness of the ring finger. 2. Cervical spondylosis: the disease can lead to changes in the physiological curvature of the cervical spine, in the evening when sleeping, if the sleeping posture is not appropriate, easy to lead to local nerve root compression, may cause numbness of the ring finger in the sleep, but also may be accompanied by upper limb radiating pain, numbness and weakness and other symptoms. 3. Diabetic peripheral neuropathy: the disease can lead to patients with peripheral nerve damage, resulting in poor blood circulation in the distal limbs, may cause numbness of the ring finger, especially at night when you sleep, the body’s blood flow rate is slow, and often exacerbate the symptoms of numbness of the ring finger. Numbness of the ring finger at night, may also be caused by other reasons, if the symptoms continue to be unable to alleviate, should seek medical advice as soon as possible, after diagnosis of the cause, by the doctor’s guidance for treatment.