Does Shaving Make Hair Grow Thicker? Dermatologists Explain

You’ve probably heard it at least once growing up. A parent, aunt, or well-meaning friend warns you not to shave your legs or underarms because the hair will “come back thicker.” Waxing, they say, is safer. Even beards aren’t spared from this myth, with plenty of people convinced that once you shave, your facial hair suddenly turns darker, denser, and harder to manage.

It’s one of those beliefs that sticks around because it feels true. After shaving, hair often looks stubbly and rough, which can be alarming when you’re expecting smooth regrowth. So let’s clear the air and look at what dermatologists actually say, how hair grows, and why shaving gets such a bad reputation.

Where the myth comes from

The idea that shaving changes hair thickness has been passed down for generations. Part of the reason it’s so convincing is how hair looks and feels right after it grows back. When hair is shaved, it’s cut off at the surface of the skin, leaving a blunt edge. That blunt edge makes regrowth feel coarse to the touch.

Waxing and plucking, on the other hand, remove hair from the root. When it grows back, the tip is naturally tapered, which feels softer against the skin. That contrast alone is enough to make many people believe shaving somehow alters the hair itself.

Dermatologists have studied and debunked this for decades¹, and the conclusion has stayed the same. Shaving does not change the structure, colour, or thickness of your hair.

How hair actually grows

To understand why shaving doesn’t affect thickness, it helps to know how hair grows. Each hair grows from a follicle under the skin. The follicle determines the hair’s colour, thickness, and growth rate, and shaving never reaches this part.

Hair growth happens in cycles:

1. Anagen (growth phase): Hair actively grows from the follicle.

2. Catagen (transition phase): Growth slows, and the follicle shrinks.

3. Telogen (resting phase): Hair eventually sheds, and a new cycle begins.

Shaving only cuts the hair shaft at the skin level. It doesn’t interact with the follicle, hormones, or blood supply, which means it can’t make hair grow back thicker or faster.

Why shaved hair feels coarser

If shaving doesn’t change hair thickness, why does it feel so different?

It comes down to geometry, not biology. Naturally grown hair has a fine, tapered tip. When you shave, you slice the hair straight across, creating a flat, blunt end². As that hair grows out, the blunt edge pushes through the skin and feels rougher to your fingers.

There’s also the visual effect. Short hair looks darker and more noticeable because light reflects differently off a blunt surface. Longer hair tends to appear finer and lighter at the ends, even when the thickness hasn’t changed at all.

This is why many people ask, “Does shaving make hair grow thicker?,” even after being told it doesn’t. The sensory difference is real, but the biological change isn’t.

What dermatologists consistently say

Dermatologists are very clear on this topic. Shaving does not:

Increase the number of hairs.
Change hair colour.
Alter hair growth speed.
Make hair grow back thicker.

Classic studies, including controlled trials where one leg was shaved and the other left alone, found no difference in regrowth thickness or density over time³. Modern dermatology bodies continue to confirm these findings. If hair does appear thicker over time, it’s usually due to other factors such as hormonal changes, ageing, or genetics, not shaving.

Hormones play a bigger role than razors

One reason this myth persists is that people often start shaving during puberty or other hormonal shifts. During these periods, hair naturally becomes coarser and darker, especially in areas like the underarms, legs, and face.

Because shaving happens around the same time, it gets the blame. In reality, hormones such as androgens are responsible for those changes. This is also why beard hair changes over time. Facial hair may become thicker and more noticeable in your 20s or 30s, regardless of how often you shave.

Shaving versus waxing and other methods

Each hair removal method has its own pros and cons, and none of them permanently changes hair thickness.

Shaving: Quick, painless for most people, and affordable. Regrowth feels stubbly because of the blunt edge.
Waxing or plucking: Longer-lasting smoothness, but more discomfort and risk of ingrown hairs or skin irritation.
Depilatory creams: Chemically dissolve hair, which can leave softer regrowth but may irritate sensitive skin.
Laser treatments: Focus energy directly on the hair follicle to slow regrowth over time, which is why many people choose them for the impressive, long-term benefits such as permanent hair reduction.

Choosing a method is more about comfort, convenience, and skin sensitivity than hair thickness.

Common shaving concerns that are actually valid

While shaving won’t thicken hair, some concerns around shaving are real and worth paying attention to.

Skin irritation, razor burn, and ingrown hairs can happen, especially if you shave dry, use dull blades, or shave against the direction of hair growth. These issues can make regrowth look uneven or inflamed, which adds to the perception that hair is worse after shaving.

Using a sharp blade, shaving with the grain, and moisturising afterwards can make a noticeable difference to how your skin and hair feel.

When hair really does change

If you notice sudden or dramatic changes in hair growth, thickness, or distribution, it’s not your razor. Medical factors may be involved.

Conditions such as polycystic ovary syndrome (PCOS), thyroid disorders, or hormonal imbalances can cause increased or coarser hair growth⁴. Certain medications can also affect hair patterns. In these cases, a dermatologist can help identify the cause and recommend appropriate treatment.

Conclusion

Shaving has been unfairly blamed for decades. The science is clear, and dermatologists agree. Shaving doesn’t change your hair’s biology. It only changes how the hair looks and feels as it grows back.

If hair growth or skin irritation is bothering you, or if you’re exploring longer-term hair reduction solutions, getting professional advice matters. A dermatologist can assess your skin, explain your options, and recommend treatments that suit your lifestyle and goals.

For personalised care and evidence-based treatments, consider Angeline Yong Dermatology, where medical-grade solutions are tailored to your skin and hair concerns. Sometimes, the best way to move past myths is with expert guidance you can trust.

References

Vreeman, R. C., & Carroll, A. E. (2007). Medical myths. BMJ (Clinical research ed.), 335(7633), 1288–1289. https://doi.org/10.1136/bmj.39420.420370.25

Cherney, K. (2019, December 4). Does shaving make hair thicker or faster? myths and facts. Healthline. https://www.healthline.com/health/does-shaving-make-hair-thicker

Lynfield, Y. L., & Macwilliams, P. (1970). Shaving and hair growth. The Journal of investigative dermatology, 55(3), 170–172. https://doi.org/10.1111/1523-1747.ep12280667

Goodman, N. F., Bledsoe, M. B., Cobin, R. H., Futterweit, W., Goldzieher, J. W., Petak, S. M., Smith, K. D., Steinberger, E., & American Association of Clinical Endocrinologists Hyperandrogenic Disorders Task Force (2001). American Association of Clinical Endocrinologists medical guidelines for the clinical practice for the diagnosis and treatment of hyperandrogenic disorders. Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists, 7(2), 120–134.

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Does Shaving Make Hair Grow Thicker? Dermatologists Explain