Stretch marks while losing weight: what to know

Stretch marks, also called striae, are lines formed when deeper skin tissue changes faster than its supporting fibres can adapt. During weight loss, looser skin, reduced fullness, and shifts in hydration can make older lines easier to see. New marks may also follow changes in body size rather than weight gain alone. They can start pink, red, purple, or darker than surrounding skin, then gradually become paler and slightly indented. They are not a sign that weight loss is harming your skin, and they are not contagious.

Keep weight changes gradual when possible, eat a varied diet, moisturise for comfort, and avoid scratching itchy areas. Creams and oils may reduce dryness but do not reliably erase established marks. If their texture or colour bothers you, a dermatologist can assess whether treatment fits your skin type and the age of the marks. Options may include Microneedling, Fractional Laser Treatment, RF Microneedling, or Carboxytherapy; each has different downtime, risks, and suitability.

Arrange a clinical assessment if marks appear suddenly without an obvious body-size change, spread quickly, itch intensely, bruise easily, or occur with unusual weakness or other new symptoms. A clinician can examine the pattern and review medicines, including steroid tablets, creams, or injections, which can affect skin structure. Seek prompt advice for painful, warm, swollen, or broken skin rather than treating it as a simple stretch mark.

Ask whether the lines are typical stretch marks, whether any medicine could be contributing, which option suits their colour and texture, and what recovery and skin-protection plan to expect.