Rheumatoid pains are a sign of articular cartilage. The cartilages on the surface of the bones in the joints contain a lot of water. If the cartilage is properly hydrated, the two opposite surfaces can move freely relative to each other during movement. The cells on the surface of cartilage are constantly consuming. Dehydrated cartilage consumes very quickly. In a dehydration situation, the blood is not diluted enough, so it can not provide water for the cartilage. Then the cartilage begins to draw water from the blood vessels of the joint capsule, which activates the signal in the form of pain. Swelling and swelling of the joint are associated with the dilatation of blood vessels in the joint capsule, which attempts to replenish the water in the cartilage. Such long-term dehydration may cause irreversible changes in the form of complete clashing of the cartilage and the unveiling of bone surface, which leads to osteoporosis. Therefore, when the first signs of joint pain appear, we should first of all ensure proper hydration.