In addition to the joy of welcoming a new life, many mothers have an additional worry: stretch marks. They are usually found on the abdomen, thighs, inner femur, buttocks and rear waist. Stretch marks are a kind of swelling lines, these are primary stripes of skin atrophy, initially light red in color, after a long time turn to light white, no conscious symptoms. During pregnancy, the color and depth of the stripes may increase gradually according to the pregnancy week, age and weight, as well as the weight of the baby and the amniotic fluid level, also related to the family history, skin type and nutritional status of the pregnant woman. How to prevent stretch marks? 1, moderate exercise, comprehensive nutrition, to avoid excessive weight growth 2, the use of belly brace, reduce abdominal gravity burden, reduce skin extension elongation 3, avoid direct sunlight, causing skin surface fracture 4, appropriate drinking water, shower temperature should not be too high, to avoid water loss 5, intake of adequate protein, vitamins and minerals, to maintain skin elasticity 6, the use of emollient cream or emollient oil to maintain skin moisture, increase How to lighten the stretch marks after having them? The most common method to reduce stretch marks is to use fractional laser. Laser treatment is the use of local focal photothermal action to induce the proliferation and rearrangement of collagen fibers and elastic fibers in the dermis, orderly deposition of collagen, increase the thickness and density of the dermis, improve skin elasticity, and improve the appearance of stretch marks, stretch marks belong to a kind of dermal scar, the use of fractional laser is effective. This therapy is safe, comfortable and effective, and the technology has become a hot spot for research in recent years.