The pain of sleeping at night with a broken foot may be related to the sleeping position, focusing on the injured area, and the presence of a fracture. 1. Sleeping position: after falling asleep the body is in a position for a long time without activity, the damaged muscle tissue will become stiff. Tissue edema and hemorrhage will occur locally. Prolonged inactivity in one position will lead to edema and hemorrhage. Concentration in one area will increase local tension and cause increased pain. 2. Concentrate on the injured part: Because after the foot sprain, the surrounding environment is noisy during the day, and the pain feels lighter by watching TV, cell phone and so on, to divert the attention. At night, when you sleep, you will be more concentrated, and you may experience more pain at the injured part. 3. Presence of fracture: If there is pinprick pain at the injury site, and the pain is more severe, diffuse swelling will appear in the local area. There is subcutaneous bruising, there may be a fracture, not get timely treatment, the pain will be worse at night when sleeping. When there is a broken foot, it is recommended to seek timely medical attention, follow the doctor’s instructions for further examination, and carry out targeted treatment with the help of the doctor.