It is perfectly fine to take three injections of sodium vitrate, but it is important to pay attention to the way it is used and the time interval between uses. Sodium vitreous acid, also known as sodium hyaluronate, is itself a lubricating fluid inside the joints and tissue gaps in the human body, which has the role of lubricating joints, filling tissue gaps and nourishing joint cartilage. If the amount of this fluid is low, it may cause localized joint lesions or related soft tissue lesions, and can be injected into the joint cavity or tissue space to achieve temporary relief. However, when using this type of treatment, it is important to go to a regular level II or higher hospital for this type of treatment, otherwise there is a risk of infection in the local joint cavity or in the interstitial space due to irregularities in the operation.