Leg pain is relieved by hot compresses because hot compresses have the effect of improving local blood circulation and relieving muscle spasms, etc. The leg pain that can be relieved by hot compresses is usually caused by cold and muscle strain, so hot compresses can relieve it. There are many factors of leg pain, such as trauma, lower extremity vascular lesions, lumbar disc herniation leading to nerve compression, osteoarthropathy and so on. The above factors are generally not effectively relieved by hot compress treatment, so the patient’s leg pain is considered to be mainly caused by cold and muscle strain. If the patient’s legs are cold, there will be transient contraction of blood vessels, muscle spasm and tension, which will lead to leg pain. If the leg muscles are strained, the muscles will have short-term stiffness, pain and other symptoms, which can also lead to leg pain. Hot compress has the effect of dilating blood vessels, improving local blood circulation, promoting local metabolism, relieving fatigue, and also relieving muscle spasm. Therefore, it can effectively relieve vasoconstriction and muscle spasm caused by cold, and relieve muscle stiffness caused by muscle strain. Therefore, patients with leg pain can be relieved by applying hot compresses. Patients should go to the hospital to check the cause of leg pain, to clarify the factors leading to leg pain and lifestyle habits, if the pain worsens, they should consult a doctor in time.