The appearance of distinctive lines on the outer thighs requires careful observation of the appearance of the lines to determine how the factors are formed. If the lines are scattered, symmetrical, or multiple, and there is a slight depression when touched by hand, it is possible that the lines are growth atrophy lines. This condition is caused by a significant change in body weight within a short period of time, and is a trace formed after the growth rate of subcutaneous tissue exceeds that of the skin, so don’t worry too much it will gradually fade over time and will not cause too much impact on the body. If the lines on the outer thighs are isolated, there are obvious bumps when touched by hand, flesh-colored or pink, and the surface is rough, consider that it may be thread-like moss. The condition is a local skin keratinization abnormality later resulting in the disease, it is recommended to choose topical adapalene gel for treatment.