It is very common to see growth lines in the knee area. Growth lines, also called growth swelling lines, are a kind of depressed change of fibroblasts that occurs when the skin in the knee area does not grow at the same rate as the subcutaneous tissue during the body’s growth process, thus causing it to be propped up. It is a kind of depressed fibroblast change. It is clearly depressed when touched by hand and has a flesh-colored, red or light pink appearance, without pain or itching and no conscious symptoms. If you want to remove them you can choose to apply humanoid collagen repair silicone gel when the growth lines first appear, or you can apply mucopolysaccharide polysulfate cream, which has an improved effect on the overall fading. You can also choose to use a carbon dioxide fractional laser, which acts directly on the skin tissue in the area of the depression through a special wavelength, causing fibroblasts to proliferate and thus flattening the skin.