The human body will gradually aggravate the lines with age, and the use of hyaluronic acid injection into the nasal base can reduce the lines. For nasal base depression will hyaluronic acid injection nasal base area, but any surgery has certain risks, this operation is no exception, as follows: 1, poor local shape: hyaluronic acid injection nasal base area, if the injection amount is insufficient or too much, uneven injection, can lead to poor local appearance, serious patients may appear deformation or displacement; 2, infection: hyaluronic acid, although there is no toxic side effects on the organism toxic side effects, but after all, it is a foreign substance, and if it is carried out in unqualified cosmetic institutions without paying attention to aseptic operation, it may cause infection; 3. After hyaluronic acid injection, some patients may have local lumps or bulges, which are generally caused by uneven injection of hyaluronic acid causing hard knots; 4. During the process of hyaluronic acid injection, if the operator is not clear about the local vascular structure, it may cause surgical misoperation, resulting in hyaluronic acid into the blood vessels. If hyaluronic acid is injected into superficial blood vessels, it may lead to local tissue blood circulation disorder, skin ischemia or necrosis, etc.