What should you know about sudden stretch marks?

Stretch marks form when deeper skin layers change faster than the surrounding tissue can adapt. They may begin as pink, red, purple, or darker lines and later become lighter or less noticeable. Growth, pregnancy, changes in body size, muscle development, and some medicines can contribute. Their appearance does not show that the skin is dirty or that you have failed to moisturise. New marks that are broad, numerous, appearing without an obvious change, or accompanied by easy bruising, unusual weakness, or changes in body shape should be discussed with a clinician.

Use a bland moisturiser if the skin feels dry or itchy, avoid vigorous rubbing, and photograph the area so you can track changes. Do not stop a prescribed medicine abruptly; ask the prescriber whether it could affect the skin. A dermatologist can discuss options after examining the colour, texture, age, and location of the marks. Treatments may soften contrast or texture rather than erase the marks. Options can 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/).

Book a medical review when marks appear rapidly across several body areas without a clear trigger, or when they come with easy bruising, muscle weakness, persistent headaches, or marked changes in weight or blood pressure. Seek urgent care for severe illness, fainting, or rapidly worsening symptoms. A clinician can decide whether the pattern is an ordinary skin change or part of a broader problem.

Could a medicine, hormonal change, growth, pregnancy, or body-size change explain these marks? Which treatment suits their colour and texture? What symptoms should prompt an earlier review?