If the ulnar nerve is damaged and causes numbness in the little finger, it can be treated by general treatment, physical therapy, medication, surgery and other methods. 1. General treatment: pay attention to rest, avoid repeated flexion and extension of the elbow joint to reduce the stimulation of the ulnar nerve. 2. Physical therapy: such as cold therapy, heat therapy, electric stimulation and so on. 3. Medications: Nutritional nerve medications, such as methylcobalamin, can be applied under the guidance of a physician, which can improve numbness of the fingers and play a certain role. 4. Surgical treatment: if the acute ulnar nerve injury caused by open nerve injury, can be early surgical repair; such as the operation to determine the nerve damage is more extensive, defective more, can be the second phase of nerve repair surgery, transplantation and other methods of treatment. When there is numbness in the little finger of ulnar nerve damage, you should go to the hospital in time to avoid delaying the condition.