In the medical code of conduct, surgeons can inject sodium hyaluronate into patients. Hyaluronic acid for injection, commonly known as sodium hyaluronate gel for injection (cross-linked or modified), belongs to the third class of medical devices and is a dermal tissue filler. When it is injected into dermal tissue, it can repair the appearance, correct the contour and achieve satisfactory results.

1. In the Catalogue of Medical Beauty Project Management, the project of "hyaluronic acid injection" is not clearly stated, but according to its scope of application, it conforms to the invasive treatment project in the cosmetic dermatology project.

2. Under the minimally invasive treatment project: aspiration, injection and filling project. So cosmetic dermatologists can inject hyaluronic acid.

3. Among the first-class cosmetic surgery items in the Medical Cosmetic Project Management Catalogue, there are such items as "temporal filling", "chin augmentation" and "rhinoplasty". In addition to the prosthesis, these operations can also use hyaluronic acid injection to fill the temple, chin and nasal back. So cosmetic surgeons can also inject hyaluronic acid.