Tanning and stretch marks: what to know

Stretch marks form when deeper skin structures stretch and remodel, leaving lines that may be red, purple, brown, or lighter than nearby skin. Tanning increases pigment in surrounding skin, but stretch-mark tissue may respond unevenly. This can make older pale lines stand out, while newer coloured marks may appear different as they mature.

A tan does not repair the underlying change and can add sun damage. A sudden, broad change in the skin, easy bruising, or stretch marks appearing without an obvious period of growth, weight change, pregnancy, or muscle development should be discussed with a clinician.

Avoid deliberate tanning and cover the area when practical. Use sunscreen on exposed skin and moisturise for comfort, but know that moisturiser does not rebuild stretched support tissue. Do not scratch, aggressively exfoliate, or apply unverified bleaching products.

If the marks bother you, a dermatologist can assess their age, colour, texture, and location before discussing options. Depending on the goal and skin type, conversations may include [Microneedling](/treatments/aesthetic-procedures/microneedling/), [Fractional Laser Treatment](/treatments/laser-and-energy/fractional-laser-treatment/), [RF Microneedling](/treatments/laser-and-energy/rf-microneedling/), or [Carboxytherapy](/treatments/aesthetic-procedures/carboxytherapy/). Results and suitability vary, and several appointments may be considered.

Arrange medical advice if stretch marks appear rapidly without an apparent trigger, cover unusual areas, or occur with muscle weakness, easy bruising, or other new body changes. Seek prompt care for pain, ulceration, bleeding, marked swelling, or signs of infection rather than treating the area cosmetically.

Ask: Are these typical stretch marks? Are they early or mature? How might my skin tone affect treatment choice? What improvement is realistic? How should I protect the area before and after a procedure? What side effects and downtime should I plan for?