Stretch marks and obesity lines can be seen in many parts of the body, there is a difference between the two, mainly in the cause, performance and relief of different ways. 1. Stretch marks: mainly refers to pregnant women in the middle and late gestation of the fetus gradually increase, after the abdominal wall of the skin dermis layer swelling cracks, resulting in the production of stretch marks, the color of the stripes will change, the middle and late gestation of the performance of light blue or purple-red stripes, after childbirth will gradually become white stripes, pregnancy and lactation is not recommended to use drug therapy. 2. Obesity lines: due to short-term weight gain, excessive accumulation of subcutaneous fat, skin growth slower than the subcutaneous tissue, dermal layer fracture, often appearing in the abdomen, outer thighs and buttocks and other locations. Obese patients should be scientific weight loss, can be relieved through a reasonable diet, more exercise. It can be improved by topical medication or phototherapy. Those who are willing to be treated are advised to go to regular medical institutions to avoid blind treatment.