White streaks on the knee are first considered to be physiological factors such as rapid growth, excessive obesity, or atrophic streaks due to local injury, also known as swelling streaks. Secondly, white streaks are also common in trauma that leads to scabbing here, leaving a lighter colored scar after the scab falls off. Atrophy lines: 1, physiological reasons: because the skin elastic fibers can not follow the speed of growth or fat, resulting in skin overstretching and fracture, this will generate a mild depression in the skin surface, and the depression of the skin is more tender and smooth, can be manifested as white stripes; 2, local injury: professional athletes or knee joint often overload the work of people, easy to cause the knee joint area muscles and other soft tissue strains, fractures, this is also prone to cause skin strains. The skin surface is also prone to stretching damage, which leads to white streaks on the knee. Second, the scar: due to the injury after the scab, easily lead to local skin pigment distribution changes, after the scab off, may lead to the scab under the skin color is relatively light, thus showing white stripes. The scar is usually above the skin surface, but there may be cases where it is partially close to or below the skin surface. The appearance of atrophic streaks and scarring is normal and should not be of undue concern to the patient. If the white streaks on the knee are aesthetically disruptive, consult your doctor for appropriate cosmetic treatment.