Magnesium for Plantar Fasciitis: Does It Actually Help?
Magnesium for plantar fasciitis is a popular home remedy, but there is no clinical trial showing that magnesium, taken as a supplement or sprayed on the skin, heals the plantar fascia. What magnesium can offer is a soothing massage ritual and comfort for tired feet and calves. The treatments that actually move recovery forward are stretching, supportive shoes, rest and time. Here is what the evidence says, which form of magnesium makes sense, and how to fit it into a routine that helps your heel.
Key takeaways
- Plantar fasciitis is very common: about 1 in 10 people will have it at some point in their life (American Family Physician, 2019).
- No published clinical trial shows that magnesium, oral or topical, treats plantar fasciitis.
- A 2017 scientific review found no solid proof that magnesium sprays, creams or bath salts are absorbed through intact skin in meaningful amounts.
- Stretching, cushioned shoes with arch support, rest and ice are the first steps recommended by the NHS.
- Magnesium oil works best as a massage aid for tired feet and tight calves, not as a cure for heel pain.
Does magnesium help plantar fasciitis?
There is currently no good evidence that magnesium helps plantar fasciitis heal. The idea comes from the fact that magnesium plays a role in normal muscle and nerve function, which is true, but that is not the same as repairing an overloaded band of connective tissue in your heel.
Plantar fasciitis happens when the plantar fascia, the thick band that runs from your heel bone to your toes, is strained. Doctors often call it plantar fasciopathy, because it behaves more like wear and degeneration than classic inflammation. That matters, because many magnesium articles promise an "anti-inflammatory" effect that has never been tested on the fascia itself.
A clinical trial on topical magnesium for plantar fasciitis has been registered in India, which shows researchers are curious, but we could not find published results. Until those exist, any claim that magnesium cures heel pain is a guess.
Does magnesium spray or magnesium oil help plantar fasciitis?
Magnesium spray can make a heel massage feel more pleasant, but the science on magnesium passing through the skin is weak. Most "magnesium oil" is actually a concentrated solution of magnesium chloride in water, which feels slippery like an oil.
In 2017, a team of German researchers reviewed the studies on transdermal magnesium, meaning magnesium applied to the skin. They concluded that the popular claims for sprays, creams and flakes are not supported by rigorous data, and that better designed studies are needed before topical magnesium can be recommended for raising magnesium levels.
That does not make a magnesium spray useless. Rubbing any product into the arch and heel is a form of soft tissue massage, and massage plus stretching is something many people with heel pain find helpful. Just be clear about where the benefit comes from: your hands and the routine, not a proven drug effect.
What about magnesium for foot cramps and tight calves?
Magnesium is widely used for cramps, yet the best available review found it is unlikely to prevent ordinary muscle cramps in most adults. A 2020 Cochrane review pooled the randomised trials of magnesium supplements for skeletal muscle cramps and concluded that magnesium was unlikely to help typical cramps in older adults.
This is relevant because tight calf muscles are a known risk factor for plantar fasciitis. The calf and the plantar fascia are linked through the Achilles tendon, so a tight calf pulls on the heel. The fix with the strongest support is not a mineral, it is regular calf and arch stretching. If you like magnesium oil, use it as the start of that stretching routine.
If you get frequent, severe cramps, or cramps together with numbness or other symptoms, talk to your GP. True magnesium deficiency is uncommon in healthy people and is usually linked to medical conditions or medicines.
Which magnesium is best for plantar fasciitis?
No form of magnesium is proven to treat plantar fasciitis, so the best magnesium is the one that fits a sensible purpose. Food comes first: the NIH Office of Dietary Supplements lists legumes, nuts, seeds, whole grains and leafy greens as good sources, and recommends 400 to 420 mg a day for adult men and 310 to 320 mg for adult women from all sources combined.
| Form | How it is used | Evidence for heel pain | Most sensible use |
|---|---|---|---|
| Magnesium from food | Nuts, seeds, beans, whole grains, greens | None specific | General health, always a good base |
| Oral supplement (glycinate, citrate) | Tablets or capsules | None specific; Cochrane found little effect on cramps | Only if a doctor confirms low intake |
| Magnesium oil or spray | Sprayed and massaged into skin | Skin absorption unproven | Massage aid before stretching |
| Magnesium cream | Rubbed into arch and calf | Skin absorption unproven | Massage aid, adds moisture |
| Epsom salt foot soak | Dissolved in warm water | None specific | Relaxing warm soak for tired feet |
A word of caution on tablets: the NIH sets an upper limit of 350 mg a day for magnesium from supplements and medicines in adults, because higher doses can cause diarrhoea, nausea and stomach cramps. People with kidney disease should not take magnesium supplements without medical advice.
What actually helps plantar fasciitis heal?
The good news is that most people get better with simple, consistent care. According to American Family Physician, about 80% of people with plantar fasciitis improve within 12 months with proper treatment.
The NHS recommends these first steps:
- Rest and raise your foot when you can.
- Put an ice pack wrapped in a towel on the painful area for up to 20 minutes every 2 to 3 hours.
- Wear shoes with cushioned heels and good arch support, and consider insoles or heel pads.
- Do gentle stretches for the sole of your foot and your calf every day.
- Choose low impact exercise such as swimming while it settles.
- Avoid walking barefoot on hard floors, flip-flops, backless slippers and high heels.
In winter, hard tiled floors, thin slippers and stiff boots can all make morning heel pain worse, so a supportive indoor shoe is a smart investment. If home care is not working, a physiotherapist or podiatrist can add night splints, custom insoles or shock wave therapy.
How to use magnesium oil in a heel pain routine
If you enjoy using magnesium, the most useful way is to make it part of a daily stretch and massage habit. That keeps expectations honest and puts your effort into what is known to help.
- Warm up the tissue. After a shower or a warm foot soak, dry your feet well.
- Massage. Apply a few sprays to the arch and calf, then massage with your thumbs from heel to toes for 2 to 3 minutes. Rolling the arch over a ball or a cold bottle works too.
- Stretch. Do a wall calf stretch and gently pull your toes back towards your shin, holding each stretch for about 30 seconds.
- Protect. Put on supportive slippers or shoes before your first steps the next morning.
Our Imperial Feet Magnesium Oil is a fast-absorbing magnesium chloride spray that you apply directly where you need it, made for tired muscles and the heavy feeling after a long day on your feet. It turns the massage step above into a pleasant evening ritual. Use it as a comfort and massage product alongside stretching and good footwear, not as a replacement for them.
Avoid spraying magnesium oil on broken, cracked or freshly shaved skin, as the salt can sting.
When to see a doctor
See a GP if your heel pain is severe or stops you doing normal activities, keeps getting worse or keeps coming back, or has not improved after 2 weeks of home care. Get advice promptly if you have tingling or loss of feeling in your foot. If you have diabetes or poor circulation, have any foot pain checked by a professional before self-treating, because foot problems can become serious more quickly.
Frequently asked questions
Does magnesium spray help plantar fasciitis?
There is no clinical evidence that magnesium spray treats plantar fasciitis, and research has not shown that magnesium passes through healthy skin in meaningful amounts. A spray can still be a pleasant massage aid. Massaging the arch and calf, followed by daily stretching, is the part of the routine most likely to ease heel pain.
Which magnesium is best for plantar fasciitis?
No form of magnesium is proven to treat plantar fasciitis. Getting enough magnesium from nuts, seeds, beans, whole grains and leafy greens supports general health. Supplements only make sense if a doctor confirms low intake. Topical magnesium oil or cream is best treated as a massage product used before stretching your feet and calves.
Is magnesium cream good for plantar fasciitis?
Magnesium cream has not been tested as a treatment for plantar fasciitis, and skin absorption of magnesium is unproven. Its real value is that it makes a foot and calf massage easier and adds some moisture. For actual recovery, combine massage with daily stretching, cushioned shoes with arch support, rest and ice, as the NHS recommends.
Can magnesium help foot pain and cramps?
Magnesium is needed for normal muscle and nerve function, but a 2020 Cochrane review found magnesium supplements are unlikely to prevent ordinary muscle cramps in most adults. For foot pain, regular stretching and supportive footwear have stronger evidence. Frequent, severe cramps or numbness should be checked by a GP, as they may have another cause.
How long does plantar fasciitis take to heal?
Plantar fasciitis is usually slow to settle. American Family Physician reports that about 80% of people improve within 12 months with proper treatment, and many feel better much sooner. The NHS advises seeing a GP if your pain has not improved after 2 weeks of home care, or if it is severe or getting worse.
Related reading
Sources
- Trojian T, Tucker AK. Plantar Fasciitis. American Family Physician. 2019;99(12):744-750. aafp.org
- Gröber U, Werner T, Vormann J, Kisters K. Myth or Reality: Transdermal Magnesium? Nutrients. 2017;9(8):813. doi:10.3390/nu9080813. PubMed Central
- Garrison SR, Korownyk CS, Kolber MR, et al. Magnesium for skeletal muscle cramps. Cochrane Database of Systematic Reviews. 2020;9:CD009402. doi:10.1002/14651858.CD009402.pub3. Cochrane Library
- NHS. Plantar fasciitis. NHS website, last reviewed 14 February 2025. nhs.uk
- National Institutes of Health, Office of Dietary Supplements. Magnesium: Fact Sheet for Consumers. 2021. ods.od.nih.gov
Written by Sylke Bommel, founder of Imperial Feet.
Editorial note: the author is a formulator, not a medical practitioner. This article is for general information and is not medical advice.
