Why do joints hurt when it rains on cloudy days?

Some patients are very sensitive. They call themselves "weathermen". Why is this? Modern research believes that rheumatoid arthritis is an autoimmune disease related to hemolytic streptococcus infection. The patient's joints and peripheral blood vessels and nerves are not perfect, the vasodilation and contraction are slow and insufficient, the skin temperature rises and falls slowly, and the peripheral tiny blood vessels are disordered and paralyzed, which can't adapt to climate change. When wet, the stimulation of increased humidity enhances the nerve sensitivity of joints; When it is cold, the blood flow is slow, the adrenaline content in the blood increases, and globulin condenses, which increases the viscosity of synovial fluid in the joint cavity and increases the resistance of joint activity; When it is cloudy, windy or rainy, the air pressure decreases, which can cause fluid accumulation in the joint tissue gap, resulting in a relative increase in intracellular pressure and intra-articular pressure. These factors can lead to joint pain and swelling. However, this phenomenon is not unique to patients with rheumatoid arthritis. Because it is rainy, joint pain is a common clinical symptom, and many rheumatism may occur. The definition of rheumatism is very broad. Besides rheumatoid arthritis, it also includes dozens of diseases such as rheumatoid arthritis, ankylosing spondylitis, lupus erythematosus and osteoarthritis. Therefore, when it is cloudy, windy or rainy, there are symptoms of joint pain or aggravation. Don't blindly conclude that it is rheumatoid arthritis. You should go to the hospital for a special examination and prescribe the right medicine.