Among scar patients who receive expanders, the question of the length of burial time is one of the most important concerns of patients who always want to know the exact time of the procedure. There are several factors that influence this, and I will briefly list them here in the hope that it will help to understand our choice of procedure time. First of all, generally speaking, the expander should be buried for three or four months, which is the average time in the population, that is to say, the theoretical time, but in the individual case, it is necessary to consider the scar area, the skin tightness and your expectation of the postoperative result. In short, the scar area is large, it will take time; the skin is loose to be faster; the expander can generally reach 2 to 3 times the original volume, expand to twice or three times will know that will be better if you think about it. The skin itself before the second stage of surgery requires a thin, due to the post-operative skin will have retraction, so more skin is better. In addition, people with medical knowledge will be clear about the individual differences between people: the same treatment technology, some friends can easily achieve good results, some can not, as the treatment of the giver, always maintain a cautious attitude, sensitive foresight, step by step to ensure the safety of treatment. It takes time and patience to work towards the “best results” for our friends after taking into account the differences and minimizing the impact of all controllable factors. From the economic point of view, many scar friends are not rich people, always want to spend the least amount of money to do the most things at once, so a longer time, the best results at once, and the cost of doing so is more time. Specifically to each person’s personal situation, some due to work or study problems, so some intentionally delay their second surgery, and stop water for a period of time, so that the skin thickens, and then hit the water, that out of the skin more. Finally, from the doctor’s point of view, any doctor seeks perfect results and is responsible for each friend. The word “patient” is not used here because there is a difference between the group of scar patients and patients.