Knee and elbow joint pain at the same time may be caused by osteoarthritis, rheumatoid arthritis, gouty arthritis and other reasons. 1. Osteoarthritis: Osteoarthritis is generally caused by metabolic disorders, overloading of joints, uneven joint surfaces, congenital joint deformities, etc. In the early stage of the disease, the patient’s joints aches and pains mostly appear after cold, minor trauma or exertion; with the development of the disease, the patient’s joints will experience persistent pain, accompanied by joint swelling, joint stiffness and other symptoms. 2. Rheumatoid arthritis: Rheumatoid arthritis may be caused by microbial infection, heredity, long-term smoking, etc. At the early stage of the disease, patients will feel pain in many joints at the same time, accompanied by stiffness in the joints in the morning, and with the development of the disease, the joints of the patients will be half dislocated and other deformities. 3. Gouty arthritis: gouty arthritis is generally caused by joint trauma, long-term consumption of high-purine food, overwork, obesity, etc., the main symptoms of patients for multiple joints at the same time, irregular pain, swelling, with the development of the disease, the patient will also appear joint deformity, joint stiffness, impaired functionality, mobility and other symptoms. If you have knee and elbow joint pain at the same time, you should go to the hospital in time to see a doctor, after diagnosis under the guidance of the doctor for treatment.