Water drop sensation on the body after cervical spondylosis surgery is considered to be abnormal skin sensation, and the causes include spinal cord nerve injury, hematoma in the spinal canal, and slipped bone implant block. 1. Spinal cord nerve injury: nerve stimulation by instruments, pulling or contusion during surgery can cause nerve irritation symptoms, resulting in abnormal sensations such as water drop sensation and numbness. The spinal cord may also be damaged during surgery, resulting in abnormal sensation and limb paralysis. With the improvement of medical care and spinal cord nowadays, the possibility of such surgeries is relatively small, so please do not worry or be anxious. 2. Intravertebral hematoma: Incomplete hemostasis during surgery can lead to intravertebral hematoma, which can cause sensory abnormalities, limb movement disorders and other symptoms by compressing the nerve roots or spinal cord. 3. Slippage of implant block: after implant fusion surgery, if the cervical spine extends and flexes too much, it can lead to slippage of the implant block, and when the implant block slips off and compresses the nerve root, it can lead to abnormal sensations such as water droplet sensation. Water drop sensation after cervical spondylosis surgery may also have other pathological factors, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.