Is joint pain necessarily related to wet weather?

So far, no definite evidence has been found. In 1948, scientist Ed Sturm first studied this problem. He learned that patients with rheumatoid arthritis will feel good in a warm and dry environment. He is a Dutch doctor at Pennsylvania Medical University, Yue Se F? Helander did an experiment to let 12 people (8 with rheumatoid arthritis and 4 with osteoarthritis) enter a special "weather room" where the temperature, air pressure and humidity can be adjusted. Eight of them said they could predict the weather, and seven of them' symptoms would get worse when the humidity increased and the air pressure decreased. Storms often occur after the air pressure drops. There is a theory that the decrease of atmospheric pressure will cause swelling of tissues around joints, which may be caused by cell permeability. The vascular wall of arthritis patients is generally more permeable than that of ordinary people, so more blood enters human tissues. The pressure on blood is always greater than the surrounding body tissues, so when the external environment pressure decreases, a large amount of blood will enter the tissues. If the joint is already painful and swollen, the increased body fluid will aggravate the pain. In order to prove this point, people use balloons placed in air pressure chambers as simulation devices to carry out experiments. When the air pressure outside drops, the air in the balloon will expand. If a similar phenomenon occurs around the inflamed joint, the nerve will be stimulated by increased swelling and produce pain.

Nerves are very sensitive to air pressure, and even a slight change will respond. This explanation sounds credible, but it has not been scientifically verified. It is just a theory. Part of the reason is that the swelling degree of human joints caused by the reduction of air pressure is very small, and scientific means cannot accurately detect it. However, the results show that there is no necessary connection between weather conditions and joint pain.