Sprained foot pain but not swelling is generally considered to be soft tissue injury caused by increased tissue fluid, can be relieved by cold compresses, hot compresses or plasters. 1. Cold compress: you can take a local cold compress within 72 hours after the sprain, such as a towel will be wrapped in ice and placed in the swollen parts of the 15-20 minutes, you can reduce the exudation of tissue fluid, and then achieve the purpose of reducing swelling. 2. Hot compresses: 72 hours after the sprain, you can use hot compresses or warm water to soak the ankle joints to promote blood circulation, improve blood flow, promote inflammation absorption, and achieve the purpose of swelling subsides. 3. Apply plasters: can be used 72 hours after the injury, usually to activate blood circulation and eliminate blood stasis, anti-inflammatory and analgesic creams, such as Yunnan Baiyao Cream, Flurbiprofen Babu Cream and so on for external application. But the use of drugs should be under the guidance of a doctor, do not blindly use cause discomfort. Sprained foot pain but not swelling should also be considered whether the ligament tear or rupture, there is no possibility of fracture, so it is recommended that the patient should be timely hospital consultation and examination, to determine the cause of the disease and then targeted treatment or treatment.