The characteristics of a watermelon are its lines, the lines look good on behalf of its high wealth and handsome (tian), beautiful skin if there are lines – expansion lines will be unsightly. Unfortunately, the incidence of expansion lines (tension lines, atrophy lines, stretch marks) is also very high, the incidence of pregnancy 43%-88%, young women about 70.0%, while young men are about 40.0%. Physical factors that cause swelling lines due to skin does not adapt to the rate of subcutaneous changes (such as: puberty, weight gain, weight loss, pregnancy, bodybuilding muscle surge) resulting in the tearing of elastic fibers hormones, etc. can inhibit the formation of fibroblasts collagen, elastin and pro-fibronectin synthesis and secretion, thus causing the corresponding changes swelling lines, the initial time is red, after a period of time will become white. It is generally considered a special type of scar, which is characterized by dermal atrophy and epidermal pigment loss. So how to deal with swelling lines? Many treatments for keloid scars are more or less helpful for swelling lines, but given its specificity, the package of superficial chemical peels and topical medications have failed to achieve significant improvement. The advent of laser, especially the new fractional laser, gives us hope. Procedure A: Non-ablative fractional skin reconstruction technique (a type of Femtolaser) uses a high-precision micro-laser beam to create fine and deep stimulation in the collagen of epidermal and dermal tissues. The excitation produces a thermal effect that stimulates new healthy tissue production and collagen rearrangement. The improvement is achieved by increasing the collagen of swollen lines and tightening of the skin. Generally after 3-5 treatments a major improvement can be achieved. There is no scabbing after this laser treatment, but only mild edema and redness, which can usually be relieved in 3-5 days. It does not affect work and is especially suitable for students and office workers who cannot take time off work. Option B: Of course, if you can tolerate the crusting and its redness period, fractional CO2 laser also has good results. Means C: In addition to laser, you can also apply radiofrequency or ultrasonic radiofrequency to promote skin tightening, such technology penetrates deeper and can also play a role in fat reduction and body slimming