The pain on both sides of the neck after falling to the back of the head is usually caused by soft tissue injury in the neck during the fall, and it may also be caused by spinal cord nerve injury. 1. Neck soft tissue injury: pain on both sides of the neck after falling to the back of the head may be simple soft tissue injury, muscle ligament strain. Generally, it can be relieved after rest. If the pain is more obvious, oral pain medication, such as Loxoprofen sodium, can be taken under the guidance of the doctor to help relieve the pain. 2. Spinal cord injury: If there is pain on both sides of the neck within a short period of time after the fall, and the pain radiates to both upper limbs or one side of the upper limbs, or there is numbness of the limbs, weakness in movement and other symptoms, then there may be different degrees of spinal cord injury or spinal nerve root injury. When pain on both sides of the neck occurs after a fall to the back of the head, if the pain is not relieved by rest, or if symptoms such as radiating pain, limb numbness and weakness occur, you should consult a doctor immediately to avoid delaying the condition and causing adverse consequences.