If you use a derma roller on your scalp, keeping it clean is not optional — it is the difference between a helpful tool and a source of infection.
In this article based on his educational video, Dr. John Watts — dermatologist, trichologist and hair transplant surgeon in Hyderabad with over 2,000 successful hair transplant surgeries — answers a viewer's question about the best method to clean a derma roller after using it on the scalp.
How derma rollers help hair growth
Derma rollers are recognized for their potential to promote hair growth by inducing micro-injuries on the scalp's surface, leading to temporary inflammation. This process stimulates the release of growth factors, fostering an environment conducive to hair growth.
But the same micro-needles that help your scalp can harm it if the instrument is dirty or damaged — which is why maintenance matters.
Use it only under medical supervision
Before getting into cleaning methods, Dr. Watts underscores an important point: derma rollers should be used under the supervision of a dermatologist. They should not be bought and used randomly without proper guidance, and you must stick to the recommended needle sizes when using one at home.
The right way to clean a derma roller
Responding to viewer Ramesh Gupta — who asked whether isopropyl alcohol could be used, followed by a plain water rinse — Dr. Watts confirms that isopropyl alcohol is a suitable option.
His recommended method: dip the derma roller into isopropyl alcohol or an alternative sterilizing solution, then rinse it with plain water before storing it for future use.
When to throw it away
Dr. Watts adds a crucial cautionary note: derma rollers with broken or blunt needles, or those with particles stuck in the needles, should not be reused. In such cases, replace the derma roller entirely to ensure safety and efficacy. No amount of cleaning makes a damaged roller safe.
The bottom line
Clean your derma roller after every use by dipping it in isopropyl alcohol or another sterilizing solution, rinse with plain water, and store it properly. Inspect the needles regularly — if they are broken, blunt or clogged with particles, buy a new roller. And remember: the derma roller itself should be part of a treatment plan guided by a dermatologist, not a random purchase.
This article is for educational purposes only and is not a substitute for professional medical advice. Consult a qualified dermatologist for diagnosis and treatment.
Frequently asked questions
Can I clean my derma roller with isopropyl alcohol?
Yes. Dr. John Watts confirms isopropyl alcohol is suitable — dip the roller in it (or another sterilizing solution), then rinse with plain water before storing it.
When should a derma roller be replaced instead of cleaned?
If the needles are broken or blunt, or particles are stuck in them, the roller should not be reused. Replace it to ensure safety and effectiveness.
How do derma rollers promote hair growth?
They create micro-injuries on the scalp causing temporary inflammation, which stimulates the release of growth factors and creates an environment conducive to hair growth.
Can I use a derma roller without a doctor's advice?
Dr. Watts advises against it. Derma rollers should be used under a dermatologist's supervision, with the recommended needle sizes, not bought and used randomly.
