Hyaluronic acid is one of the most used substances in the field of micropigmentation, if used correctly it can be played for a long time. Hyaluronic acid itself is an inherent component of human skin, and its role is mainly to retain water, moisturize, and make the skin look more hydrated and tender. Long-term use should pay attention to the following three points: first, choose regular drugs, it is best to go to a tertiary hospital or a regular medical institution to choose drugs for injection, try not to go to an individual’s clinic, the source of the drug can not be guaranteed. Second, choose a good technical doctor, because hyaluronic acid is mainly divided into three kinds of small molecules, medium molecules, large molecules, three kinds of components of hyaluronic acid is the same, but the degree of cross-linking is different, that is, the stability is not the same, according to the different situations, to choose the right drugs injected into the corresponding parts. Therefore, different doctors have different level, the accuracy of choosing drugs is not the same, choose a relatively good technical doctor to inject, it will make hyaluronic acid to achieve twice the result with half the effort. Thirdly, after the injection of hyaluronic acid, you should follow the doctor’s instructions and pay attention to the corresponding precautions, such as do not smoke, drink alcohol, massage the injection site, and do not dip the wound in water within a week.