Open your mouth wide and the bone will thump, usually refers to the joint popping, consider temporomandibular joint disorder syndrome, and bone joint inflammation, bone joint displacement, joint and surrounding soft tissue infection and so on. 1. Bone alteration: Bone growths or bone cumbersome in the temporomandibular joint area will produce friction, resulting in joint popping or some other abnormal sounds. 2. Displacement of bone and joint: elongation and loss of elasticity of ligaments of joint disk can easily lead to displacement of joint disk, which cannot be recovered automatically after displacement and will cause joint popping. 3. Inflammation and infection: trauma, viral infection, bacterial infection caused by synovitis of temporomandibular joints, inflammation of joint soft tissues will affect the joint function and cause joint popping. Open your mouth wide and the bones will thump, pay attention, avoid opening your mouth wide, you can go to the hospital to find out the cause of the cause of the treatment.