From Stretch Mark Management During Pregnancy to Laser Treatment After Childbirth

Many people develop red lines as their belly grows during pregnancy, which then turn into white, wrinkled marks after childbirth. They often dismiss these as unavoidable, only to worry about them later.

Pregnancy stretch marks are known to be experienced by a significant number of pregnant women, and they often do not completely disappear naturally. However, during pregnancy, fetal safety must be the top priority, so the principle is to focus on safe management rather than aggressive medical treatment. We've compiled management methods to reduce stretch marks during pregnancy and the direction of laser treatment after childbirth.

Pregnancy stretch marks are a type of internal skin injury that occurs when the collagen and elastin tissues in the dermis, the middle layer of the skin, cannot withstand the rapid expansion of the abdomen as the fetus grows, leading to their rupture. Since it's not merely skin stretching but damage to the dermal structure itself, the marks often remain even after weight is regained post-childbirth.

In addition to weight gain, cortisol, an adrenal cortical hormone secreted during pregnancy, is known to weaken the collagen structure in the dermis. This means stretch marks can appear even without significant weight gain, and genetic factors also influence their likelihood.

Pregnancy stretch marks initially appear as pink to reddish lines, gradually changing into white, irregular marks over time. The approach varies depending on their color and form, so identifying the current state of your stretch marks is the first step. The approach for early red stretch marks differs from that for old white stretch marks.

During pregnancy, medical skin treatments, including laser procedures, are not recommended for fetal safety. During this period, the goal is to reduce the further occurrence of stretch marks and maintain skin elasticity, focusing on safe methods.

• Moisturizing Care: Dry skin can make collagen and elastin tissues more prone to rupture. Consistently using moisturizing creams or oils on the abdomen, chest, and thighs from early pregnancy can be helpful. It is recommended to check if the ingredients are safe before use or consult with your doctor.
• Weight Management: Sudden weight gain is a major cause of rapid skin expansion. Maintaining weight within an appropriate range can help reduce the occurrence of stretch marks. However, excessive weight control can affect fetal health, so caution is needed.
• Hydration and Nutrition: Adequate water intake and a balanced intake of nutrients involved in collagen synthesis, such as Vitamin C, also positively contribute to maintaining skin elasticity.

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After childbirth, you can begin management using lasers. The most important factor in stretch mark treatment is timing. Pregnancy stretch marks show a more active skin regeneration response in their early, red stage, leading to greater expected changes from laser treatment.

When patients come to the clinic with post-childbirth stretch marks, even if they are old, white stretch marks, I tell them there's no need to give up prematurely, as improvement can be expected, though the treatment period may differ. However, immediately after childbirth, a period of physical recovery is needed, and if breastfeeding, it is crucial to consult with a dermatologist first to determine the feasibility and timing of the procedure. The overall process can also be found in the Stretch Mark Treatment guide.

Because red and white stage stretch marks have different damage patterns, the laser approach also differs.

If red stretch marks remain, a vascular laser that selectively acts on hemoglobin in the blood vessels can be used. This method minimizes impact on surrounding healthy skin tissue, and approaching quickly in the red stage helps reduce progression to white or depressed stretch marks. There are also approaches focused on the red stage, such as PreScar Golden-Time Triple Care, which targets the early stage.

White or depressed stretch marks indicate damaged dermal collagen, requiring a regenerative laser to boost skin regeneration. This finely stimulates the dermis to induce new collagen production, with treatment density and depth adjusted according to the individual's skin condition.

Even after laser treatment, consistent moisturizing care is important. If the skin is dry, stretch marks may recur or worsen, so maintaining a moisturizing routine before and after treatment is helpful. Lifestyle habits that avoid sudden weight changes also positively contribute to maintaining the stretch mark condition for longer.

After the procedure, temporary erythema or heat sensation may occur, but these usually subside within a few days. It is advisable to avoid direct sunlight exposure and diligently use sunscreen. Stretch mark treatment is not a one-time procedure; multiple repeated treatments may be necessary depending on the condition, and the treatment interval will be adjusted by a specialist based on the skin's recovery state. Generally, intervals of 4-8 weeks or more are kept.

The key to managing pregnancy stretch marks is to prevent them as much as possible with safe moisturizing care during pregnancy, and then to approach them step-by-step with lasers tailored to their color and condition after childbirth. While starting early can lead to better changes, it is most important to proceed safely according to your body's condition and circumstances. Since the appropriate method may vary depending on the extent and stage of the stretch marks and your skin condition, it is recommended to consult thoroughly with a dermatologist to create a personalized plan.

If you're concerned about the timing after childbirth, consult now

Dr. Lee Sang-Joo, who reviewed this article, is a board-certified dermatologist leading Yonsei Star Dermatology Sinchon. He will serve as the president of the Korean Association of Dermatologists in 2026 and has long specialized in pigment and scar fields as an adjunct professor in the Department of Dermatology at Yonsei University College of Medicine. His profile can be viewed at Dr. Lee Sang-Joo's Introduction.

First published 2026. 6. 1. / Last reviewed 2026-07-23

This article provides general information about skin changes during pregnancy and childbirth, and treatment methods and results may vary depending on individual skin and body conditions. Especially if you are pregnant or breastfeeding, please be sure to consult with a dermatologist before deciding whether to proceed.