Foot pain and low back pain do not usually coexist because they belong to two completely different tissues, one for the ankle joint and one for the lumbar spine joint. If there is a clinical condition that can cause pain in both at the same time, it usually belongs to rheumatoid arthritis or ankylosing spondylitis. Since both diseases cause pain in joints throughout the body, they can cause pain in large joints, such as the lumbar spine joint and ankle joint, when the symptoms are further aggravated. If there is pain in both locations, it is recommended that the patient visit a hospital to investigate rheumatoid arthritis or ankylosing spondylitis. After diagnosis, better results can be achieved through oral medication. There is no direct clinical cure for either disease, but only the option of symptom relief.