A knee x-ray usually costs about 100 dollars. The specific charges are related to the grade of the hospital and its instruments and equipment, as well as the local economic level. The knee is the knee joint, when there are lesions, because the knee joint lesions caused by more factors, such as trauma, joint inflammation, tumor lesions, etc., so we must combine the patient’s symptoms, improve the other checkups, such as CT or MRI, etc., to carry out a comprehensive analysis and judgment, and after the diagnosis results, you should listen to the professional doctor’s guidance, and carry out the treatment. If the knee joint disease, it is recommended to go to the hospital in time to improve the relevant examination, to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.