If you break your foot going down the stairs, you can take the following measures: 1. Find a safe place to sit down or lie down and rest as soon as possible. 2. Take off your shoes and socks as soon as possible and apply a cold compress to the painful area using ice. If you have Yunnan Baiyao spray, spray the affected area with the red bottle for 30 seconds or more, and then with the white bottle two minutes later. 3. After these treatments, use an elastic bandage or ankle brace to immobilize the ankle joint. Afterwards, with the help of your family and others, go to the nearest hospital emergency department or orthopedic department to clarify the exact location and severity of the ankle injury. If there is only a soft tissue injury, you can continue to immobilize the ankle with the above-mentioned device, and then use anti-inflammatory and anti-swelling medication. However, if there is a fracture, it should be repositioned and fixed as soon as possible.