Joint & Muscle Health · Ingredient Guide
Camphor vs. Menthol: How Cooling Pain-Relief Rubs Really Work
By the Your Supplement Digest Editorial Team · Published September 25, 2026 · Based on FDA and peer-reviewed sources
Pick up almost any muscle rub, balm or roll-on and you’ll find the same two ingredients near the top of the label: camphor and menthol. Both create that familiar cold-then-warm tingle, and both are FDA-recognized active ingredients for over-the-counter pain relief. But they aren’t the same thing.
This guide explains how each one works, how they differ, why so many products combine them, and how to use them safely.
Quick answer
- Menthol mainly produces a cooling sensation by activating the skin’s cold receptors.
- Camphor produces a cooling-then-warming sensation and acts on heat- and warmth-sensing receptors.
- Both are counterirritants: they create a milder sensation on the skin that can temporarily make an ache underneath feel less noticeable.
- They’re often combined because their sensations complement each other.
What is a counterirritant?
A counterirritant is an ingredient that creates a mild, harmless sensation on the skin, such as cooling, warming or tingling. That new sensation competes with the ache underneath, so the ache can feel less noticeable for a while. The FDA’s rules for over-the-counter external analgesics list camphor and menthol among the counterirritant ingredients that produce a cooling sensation (FDA OTC Monograph M017).
Counterirritants are designed for temporary relief of minor muscle and joint aches, such as those from simple backache, strains and sprains.
How menthol works
Menthol is the compound that makes mint feel cold. It activates a cold-sensing receptor in the skin called TRPM8, which is why menthol feels cool even though it doesn’t change skin temperature. A 2018 review describes menthol’s counterirritant action: it first stimulates the nerves that sense discomfort and then makes them less responsive, and clinical studies have reported benefits for musculoskeletal pain (Pergolizzi et al., 2018). Lab research also shows TRPM8 is central to menthol’s pain-relieving effect (Liu et al., 2013).
Under FDA’s monograph, menthol can be used in OTC external analgesics at concentrations from 1.25% to 16%.
How camphor works
Camphor was traditionally taken from the camphor laurel tree and is now usually made synthetically. On the skin it produces a cooling sensation that gradually turns warm. Laboratory research found camphor activates and then strongly desensitizes TRPV1, a receptor involved in heat and pain sensation, which may help explain its analgesic effect (Xu et al., 2005).
Under FDA’s monograph, camphor can be used in OTC external analgesics at concentrations above 3% and up to 11%.
Camphor vs. menthol at a glance
| Menthol | Camphor | |
|---|---|---|
| Main sensation | Cooling | Cooling, then warming |
| Key receptor | TRPM8 (cold) | TRPV1 (heat and pain) |
| FDA OTC strength | 1.25%–16% | Over 3%, up to 11% |
| Natural source | Mint plants, including peppermint | Camphor laurel tree (now mostly synthetic) |
| Safety note | Keep away from the face of infants and small children | Dangerous if swallowed, especially for children |
Why many products combine them
Because menthol leans cool and camphor adds a gradual warmth, many rubs, balms and roll-ons use both to create a layered sensation. Some formulas also add peppermint oil, which naturally contains menthol, for extra cooling and a fresh scent.
For example, Roll On Relief combines camphor, menthol and peppermint oil in a roll-on applicator, so you can apply the formula directly to a sore spot without rubbing cream in by hand.
Looking for a convenient camphor-and-menthol option?
Read our full review of Roll On Relief: what’s inside, how to use it, pricing and the 60-day guarantee.
How to use camphor and menthol products safely
- Use them on the outside of the body only, on clean, unbroken skin.
- Keep them away from your eyes, mouth and other mucous membranes.
- Don’t use them with a heating pad or bandage the area tightly.
- Follow the label’s daily limit, and wash your hands after applying.
- Keep them out of reach of children. Camphor can cause serious poisoning, including seizures, if a child swallows it (Pediatrics, 2009). If anyone swallows a product, contact Poison Control at 1-800-222-1222.
- NIH’s NCCIH cautions that menthol shouldn’t be applied to the face of an infant or small child, because it may affect their breathing (NCCIH).
- Stop using the product if you notice more than mild irritation, and see a doctor if pain lasts more than 7 days or gets worse.
Which should you choose?
There’s no single winner. Menthol-forward products feel more intensely cool, while formulas with camphor add a warming layer. Many people simply prefer a product that combines both. If your skin is sensitive, start with a small area.
If you’re weighing a rub against a pill, our guide to topical vs. oral pain relief explains the differences in how they work, the evidence and safety.
FAQ
Is camphor or menthol stronger?
They work differently rather than one being “stronger.” The strength of a product depends on its concentration, which the FDA caps for OTC use.
Can I use camphor and menthol together?
Yes. Many OTC products already combine them. Just don’t layer several different rubs on the same area.
Do camphor and menthol heal injuries?
No. They’re designed for temporary relief of minor aches. They don’t repair muscles or joints.
Is peppermint oil the same as menthol?
Peppermint oil naturally contains menthol, along with other compounds, so it adds a similar cooling sensation.
Sources: U.S. FDA, OTC Monograph M017; Pergolizzi et al., J Clin Pharm Ther (2018); Liu et al., Pain (2013); Xu et al., J Neurosci (2005); Khine et al., Pediatrics (2009); NIH NCCIH, Peppermint Oil. See our Editorial Policy.
This article is for general information and isn’t a substitute for professional medical advice. Always follow the product label. See our Medical Disclaimer.