Knees will be particularly painful on rainy days. What kind of disease is this?

On cloudy, rainy and cold days, knee pain is uncomfortable. Many people blame whether cold is the cause of knee pain. For healthy people, rainy days will not cause knee pain. For some people with knee problems, cold weather will aggravate knee pain. Common knee problems include knee osteoarthritis, rheumatism and rheumatism.

1. osteoarthritis. First of all, cold rain will not cause osteoarthritis. Osteoarthritis, also known as knee joint degeneration, is caused by friction such as cartilage aging and fatigue, and has nothing to do with cold rain! The incidence of osteoarthritis is very high. Due to excessive exercise, improper exercise and aging, the cartilage of patella and femur is affected by abnormal friction, and some will form bone spurs. You know, once cartilage is worn, it is almost impossible to recover due to insufficient blood supply.

Although rainy and cold weather will not cause osteoarthritis, it is more sensitive to pain. Due to the change of weather, especially cold weather, the body physiology of patients with osteoarthritis changes, the blood vessels around the joints contract and the blood supply decreases, which can lead to the pathological changes of joint tissue ischemia, thus leading to the occurrence or aggravation of joint stiffness and pain. Therefore, many old people like to keep their knees warm, so it is understandable to wear thick knee pads. Keeping warm can promote blood circulation, metabolize inflammatory and fatigue substances, relieve pain, and is also a kind of psychological comfort.

2. Rheumatoid arthritis. This is different from osteoarthritis, which is caused by degeneration At present, the etiology and pathogenesis of rheumatoid arthritis are still unclear. At present, it is considered to be closely related to human hemolytic streptococcus infection, especially joint swelling and pain. Although cold, cloudy and rainy days will continue to cause symptoms, they are not the cause.

Especially rheumatoid arthritis, it is confirmed that 90% of rheumatoid arthritis symptoms are sensitive to climate change. Why does rain on cloudy days cause joint pain? It is considered that the function of joints and nerve endings in patients with rheumatism is not perfect, the vasodilation and contraction are slow and insufficient, the skin temperature rises and falls slowly, and the peripheral microvessels are damaged, so they are careless and can not adapt to the results of 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 leads to the increase of synovial fluid viscosity in the joint cavity and the increase of joint activity resistance. When it is cloudy, windy and rainy, the air pressure decreases, which can make the fluid between joint tissues accumulate, resulting in the relative increase of intracellular pressure and joint cavity pressure. These factors lead to joint pain and swelling.

3. Rheumatoid arthritis: Rheumatoid arthritis is completely different from rheumatoid arthritis, and it is an autoimmune disease, which is more common in synovitis. Studies have shown that weather changes will enhance the immune response of patients with rheumatoid arthritis, increase the expression of autoantibodies, make the disease worse and cause pain. At the same time, influenced by traditional medicine since ancient times, China people are used to hot compress and hot water, so it is natural to think that cold is the cause of illness and aggravation, which is a psychological effect. To sum up, rain, dampness and cold are not the causes of various knee joint diseases, but aggravate the symptoms on the basis of the original diseases. Therefore, if there is knee pain in rainy days and cold weather, it is recommended to go to the hospital for further examination to see if there is any problem with the knee joint.