Thin people can also have an S-shape. The problem of thin breasts has always been a big problem. If thin people want to make their breasts fight, you must first know why thin people have small breasts. Most of the breasts are still fat and have breast tissue. Thin breasts must first distinguish between congenital and acquired. Generally, the mammary duct is blocked, so that nutrients cannot enter the mammary gland, so that breast cells have no tension and no ability to absorb fat. Therefore, if thin people want breast enhancement, they should first clear the mammary duct, supplement nutrition and activate breast cells.