Foot and knee pain for a few days, feel the same side to the shoulder a little bit of swelling up to the shoulder, consider rheumatoid arthritis, synovitis or osteoporosis and so on. 1. Rheumatoid arthritis: mainly manifested as joint pain, wandering, joint swelling, morning stiffness, rheumatism test can be a clear diagnosis. 2. Synovitis: mainly for the synovial joints occurring aseptic inflammation, synovial hyperplasia and hypertrophy, secretion of fluid caused by joint swelling, joint pain, you can take ultrashort-wave physiotherapy or low-frequency transdermal therapy, follow the doctor’s instructions oral synovitis particles and so on. 3. Osteoporosis: the whole body joints can appear pain, through the line of bone density test to clarify the diagnosis, the application of anti-osteoporosis drugs, such as Xian Ling Bone Plough capsule or salmon calcitonin and other treatments. Foot and knee pain for a few days, feel a little bit of this side of the swelling all the way to the shoulder, it is best to go to the hospital to check, under the guidance of the doctor to determine the cause of the disease for treatment. The use of drugs need to follow the doctor’s advice.