Pain in the joints for no reason, if there is no swelling of this condition, it may be caused by too much activity or a posture for too long. If the joint is painful and swollen, it may be caused by gout. This condition is caused by eating food or drinking alcohol that contains a lot of purines, and the diagnosis can be clarified by testing uric acid. If the pain in several joints is wandering, it is caused by rheumatoid arthritis, and a rheumatology triple test can be performed to clarify the diagnosis. Another condition is osteoporosis or calcium deficiency, which can also cause joint pain, and the pain can be accompanied by calf cramps at night. The diagnosis can be further clarified by measuring bone density and calcium. For unexplained joint pain, an examination is needed to clarify the cause.