My wife's knuckles were swollen in spring and she felt itchy. Is this rheumatoid arthritis?

There is a saying that wet weather will aggravate the symptoms of arthritis, which seems to be nonsense, but it is not. Joseph Holland, a rheumatologist, built a climate chamber in 1960s, which was specially tested by experiments. He found that high humidity and low air pressure-meteorological conditions before rain-were indeed related to joint pain or stiffness. One explanation is that weather changes lead to swelling of joint ligaments, and the surrounding nerves perceive this swelling, thus causing pain. Another explanation is that when the air pressure drops, the gas expansion in the joints affects the nerves, so it hurts. A recent experimental study by Japanese scientists proved that back pain caused by air pressure change is related to a vacuum phenomenon. That is, when the air pressure drops, gas accumulates in the gap between the vertebrae of the spine. When a soft tissue between vertebrae degenerates, such bubbles will appear, which is more common in the elderly. Such bubbles may also form in other joints. Friends who ask questions have no choice but to keep their knees dry and warm. This friend seems to be the most qualified weatherman in the local TV station. There is an explanation for this kind of knee that can "predict the weather", and it is believed that the reason is "bone contusion", that is, tiny cracks appear in trabecular bone or cancellous bone, causing bleeding and edema. Studies have shown that this phenomenon is not uncommon after knee ligament injury. Changes in air pressure may change the volume of edema in bones, thus causing pain. If so, then, by using magnetic resonance imaging technology, we should be able to see the bone contusion, and the patient's ability to predict the weather should gradually disappear with the healing of the injured part.