The causes of finger, toe and waist pain may be strenuous exercise, rheumatoid arthritis with lumbar muscle strain and so on. 1. Strenuous exercise: Strenuous exercise can cause muscle spasms and tendon injuries in the relevant joints of the body, resulting in pain in the fingers, toes and lower back. 2. Rheumatoid arthritis with lumbar muscle strain: rheumatoid arthritis is mainly manifested as symmetrical pain in small joints of the hands and feet, but generally there is no lumbar pain, and if accompanied by lumbar muscle strain or lumbar disc herniation, lumbar pain may occur. Finger, toe and lumbar pain may have other causes, should be timely to the regular hospital consultation, by the doctor according to the symptoms, signs and auxiliary examination to determine the specific cause of the disease, for the cause to give the correct treatment.