Blood sedimentation, C-reactive protein normal joint pain may be caused by gouty arthritis, periarticular ligament injury, articular cartilage injury and so on. 1. Gouty arthritis: after urate crystals are deposited in the joints and surrounding soft tissues, it leads to inflammatory reaction. Laboratory examination of blood uric acid level is elevated, blood sedimentation and C-reactive protein may be normal. 2. Periarticular ligament injury: when the patient is subjected to external force during exercise, such as abnormal inversion or eversion and other abnormal activities, it may lead to ligament injury around the joint and joint pain symptoms, at this time, the patient’s blood sedimentation and C-reactive protein test may be normal. 3. Articular cartilage injury: patients in the exercise due to improper exercise or external forces lead to articular cartilage injury may also appear blood sedimentation, C-reactive protein test is normal and joint pain symptoms. There may be other reasons for joint pain with normal hematocrit and C-reactive protein, so it is recommended that patients go to regular hospitals to further improve the relevant auxiliary examinations to make a clear diagnosis.