Understanding stretch marks
Stretch marks are common lines on the skin that form when the deeper layers of the skin change quickly. They are usually seen on the stomach, thighs, hips, breasts and upper arms.
Many people notice them after growth spurts, pregnancy, muscle gain or changes in body weight. They can appear red, purple or silvery and often soften in appearance over time.
Stretch marks are not a sign of poor health, but a GP review is encouraged if something looks unusual, painful or very different from your normal skin pattern.
This page explains possible causes, contributing factors, the impact on daily life and the consultation options you can discuss with a qualified practitioner.
What causes stretch marks?
Cause #1 – Rapid growth
Growth spurts during puberty can stretch the skin faster than it can adapt.
Cause #2 – Pregnancy
The skin can stretch significantly during pregnancy, which may lead to stretch mark formation on the stomach, breasts or hips.
Cause #3 – Weight or muscle changes
Increases in weight or muscle size can place extra tension on the skin.
Cause #4 – Hormonal influences
Hormonal shifts can affect how elastic the skin feels and how easily stretch marks form.
Cause #5 – Medical and genetic factors
Some medical conditions and genetic traits influence skin structure, elasticity or collagen. A GP can check for any underlying causes if stretch marks appear suddenly or look unusual.
Why do some people get stretch marks and others don’t?
Factor #1 – Skin elasticity
Differences in collagen and elastin influence how well the skin stretches.
Factor #2 – Hormones
Hormonal patterns affect how the skin responds to changes in size or tension.
Factor #3 – Genetics
Family history plays a role in how easily stretch marks form.
Factor #4 – Rate of change
Skin that stretches quickly is more likely to develop visible lines than skin that changes gradually.
The impact of stretch marks
Stretch marks can affect:
- Confidence in clothing Â
- Interest in certain activities Â
- How people feel about changes in their body Â
- Overall comfort with body imageÂ
Many people find the emotional impact greater than the physical impact.
Frequently Asked Questions
Q: Are stretch marks harmful?
A: Stretch marks are usually not harmful. Any mark that changes, becomes painful or looks different from your usual pattern should be checked by your GP.
Q: Why are some stretch marks red and others silvery?
A: Newer stretch marks often look red or purple. Older ones tend to fade to a paler colour.
Q: Can a cream remove stretch marks?
A: Topical products generally cannot remove stretch marks. Some may support hydration or help the skin feel smoother.
Q: Can Medicare help with stretch marks?
Medicare generally does not cover cosmetic concerns. A GP can explain whether any medical criteria apply after a clinical assessment.
