The causes of insomnia after fracture surgery may be the side effect of anesthesia, pain at the operation site, mental tension and so on. 1. Side effect of anesthesia: Some of the fracture surgeries need to be carried out under general anesthesia, even if you wake up after the surgery, you may still have trance, dizziness, insomnia and other symptoms, which may be caused by the side effect of anesthesia, and usually can disappear gradually. 2. Surgical site pain: after fracture surgery, there may be pain at the surgical site, which may cause discomfort during sleep, thus causing insomnia. 3. Mental tension: after fracture surgery, some patients may have psychological pressure and worry about the effect of surgery, leading to anxiety and insomnia. After fracture surgery, it is recommended to relax and spend more time with family and friends to relieve anxiety. If frequent insomnia or insomnia is serious, it is recommended to seek medical help in time and receive reasonable treatment under the guidance of the doctor.