Then, why do my knees hurt when it rains?
Blame it on the barometric pressure: Any change in pressure, or the weight of the air pressing against the surface of the earth, can trigger joint pain or headaches in some people. "All of those tissues have nerve endings in them, so they're going to feel changes in the weather as tightness in the joint, or stiffness."
Secondly, why is my arthritis worse when it rains? During times of rain and snow, the temperature drops and barometric pressure decreases. This can cause fluid in the joints to thicken, which makes them stiffer. If you have stiff joints, you may be more sensitive to pain during movement, making arthritis pain seem worse.
Then, why do legs ache when it rains?
A drop in barometric pressure often precedes a storm, and the theory goes that a decrease in the air pressure can cause the tissues around the joints to swell, causing arthritic pain. If the same happened in the area around an arthritic joint, the expansion or swelling could irritate the nerves, causing pain.
Does rain really affect arthritis?
Many people with arthritis feel worsening symptoms before and during rainy days. A drop in pressure often precedes cold, rainy weather. Elaine Husni, a rheumatologist at the Cleveland Clinic, says weather doesn't cause arthritis or make it worse. But it can temporarily cause it to hurt more.
