There is fluid inside the bone, usually as a result of MRI, the approach is as follows: a. If the fluid inside the bone caused by trauma, there is no local redness, swelling, heat, pain and other infectious phenomena, this is caused by local accumulation of blood or hemorrhagic tissue, through local fixation treatment, and then apply blood circulation and blood stasis, swelling and pain relief drugs to oral or external application, etc., are able to promote the absorption of fluid, thereby relieving symptoms. Second, if there is no history of trauma, or the bone has been completely treated after trauma, and there is a local effusion accompanied by redness, swelling, heat and pain, this situation may be caused by osteomyelitis, it is necessary to give surgical treatment, surgical incision to remove the inflammatory tissue and necrotic bone, but also must be left with drainage tubes to fully drain, and then use antibiotics to regular anti-infection treatment, in order to be able to treat It is necessary to leave a drainage tube to drain the bone adequately and use antibiotics to treat the infection.