Joint pain is the most common symptom of joint disease. Depending on the cause and course of the disease, joint pain can be divided into acute and chronic. Acute arthralgia is characterized by inflammatory reactions in the joints and surrounding tissues, while chronic arthralgia is characterized by hypertrophy of the joint capsule and osteophytes. The following is a brief description of common diseases that cause arthralgia and their clinical characteristics: degenerative arthritis: also known as osteoarthritis, mostly seen in obese elderly people, more common in women, with a family history, often with multiple joint involvement; early manifestations of walking, standing for a long time and weather changes are pain in the diseased joints, relieved after rest. If the affected joints are metacarpophalangeal and interphalangeal joints, in addition to joint pain, the patient often feels stiffness and swelling of the fingers and has difficulty moving. If the knee joint is involved: it is often accompanied by joint effusion, elevated skin temperature, and pain at the joint edges; in the advanced stage, the pain of the diseased joint increases and continues to radiate to other places, with a feeling of friction in the joint and a ringing sound when moving, and the patient often limps. Gout: The pain is often acute after drinking alcohol, exertion or a high purine diet, and the local skin is red, swollen and hot, and the patient often wakes up at night with pain. Traumatic arthralgia: Pain, swelling and dysfunction of damaged joints often appear immediately after trauma, such as ankle sprains. Chronic traumatic arthritis has a clear history of trauma, such as meniscal injury; recurrent arthralgia, often triggered by stimuli such as excessive activity and weight bearing and cold weather, and relieved by medication and physical therapy; rheumatoid arthritis: mostly starts in one joint, with the first pain in the interphalangeal joint of the middle finger. Rheumatoid arthritis: the disease starts rapidly, often after streptococcal infection, and is common in the knee, ankle, shoulder and hip joints. Metabolic bone disease: osteochondrosis caused by vitamin D deficiency due to osteoporosis, diabetes mellitus, hyperparathyroidism, etc. Tuberculosis arthritis: most common in children and adolescents, with the spine being the most common, followed by the hip and knee joints. The active period often has fatigue and low fever, night sweats and decreased appetite, and the pain of the diseased joints increases after activity. Bone and joint tumors: Various benign and malignant tumors of bone can cause joint pain and joint movement disorders. Other diseases: such as achalasia, lumbar disc herniation, etc., cause secondary pain in the joints of the lower extremities due to changing the line of gravity of the lower extremities; growing pains: such patients are mainly children in the growth period, and are more common in boys. The painful areas are commonly found in the knee and hip joints. This condition is a normal physiological phenomenon that occurs during the growth and development of children.