Lactic Acid for Stretch Marks: What to Know

Stretch marks are lines that develop when skin stretches and its supporting structure changes. Lactic acid is an exfoliating alpha hydroxy acid: it loosens some surface buildup and can make skin feel smoother. That surface effect is different from rebuilding the deeper bands that give a stretch mark its colour and texture.

Fresh marks may look red, pink, purple, or darker than nearby skin; older marks often become lighter and silvery. Their appearance also varies with skin tone, body area, pregnancy, puberty, and changes in body size. A product that stings is not necessarily working better.

If a clinician agrees it suits your skin, start with a low-strength product on a small area and follow its label rather than layering several exfoliants. Apply to intact, moisturised skin, avoid freshly shaved or irritated areas, and stop if burning, swelling, blistering, or persistent redness develops. Protect exposed skin from sunlight, because irritation can make colour differences more noticeable.

For more established marks, a dermatologist can compare options such as Microneedling, Fractional Laser Treatment, RF Microneedling, or Carboxytherapy. Treatment choice depends on the mark's age, colour, location, skin tone, and pregnancy or breastfeeding status.

Arrange a dermatology assessment if marks appear suddenly without a clear stretching event, spread quickly, itch intensely, hurt, or occur alongside easy bruising or use of steroid medicines. Seek advice before applying acids to broken, inflamed, infected, or recently treated skin. A clinician can check the diagnosis and recommend a safer routine.

Ask whether the marks are early or mature, whether lactic acid is suitable for your skin tone, how often to apply it, and which in-clinic option fits your goals. Mention pregnancy, breastfeeding, eczema, allergies, and every product that already irritates your skin.