A callus on the foot is thick skin the body builds against pressure and rubbing, and the doctors' advice for removing one at home is short: soak it, file it gently with a pumice stone or foot file, moisturise, and never cut it. Here is what the dermatologists, the NHS and America's podiatrists say, what the few trials of creams and blades found, why Texas and Georgia forbid callus razors in salons, why anyone with diabetes or numb feet should see a podiatrist rather than a spa, and what our heel scrape in Hội An does and does not tell you.
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How do you remove a callus from your feet safely? Slowly: soak the skin in warm water, rub it down a little at a time with a pumice stone or foot file, moisturise every day, and take the pressure off with better shoes or padding. Do not cut or shave it yourself, and if you have diabetes, poor circulation or numb feet, do not treat it yourself at all: the NHS says see a GP or a foot specialist such as a podiatrist. We are Nghê Prana, a riverside hotel and spa on the Thu Bồn at Cẩm Nam in Hội An; our foot treatments include a heel scrape, so this page sets out what the evidence supports and where a spa should stop.
| Question | What the sources say | Verdict |
|---|---|---|
| What is a callus? | Thick skin built against repeated pressure or rubbing | Protection, overdone |
| Safe at home? | Soak, pumice or foot file, moisturiser, padding, better shoes | Yes, gently |
| Cut or shave it yourself? | The NHS says do not; the APMA says no foot razor at a salon either | No |
| Urea or acid creams? | Recommended by dermatologists; the trials are of dry skin, not callus | Reasonable, untested on callus |
| Will it come back? | Yes, while the pressure that made it continues | Yes |
| Grows back thicker after removal? | No study we found shows it | Not shown |
| Diabetes, numb feet, poor circulation? | Do not treat it yourself; a trained professional removes it | Podiatrist |
A callus is a flat, widespread patch of thickened skin, usually on the sole; a corn is smaller and deeper, often on a toe (APMA, America's podiatrists). Both form "as a result of friction or pressure on the skin" and "develop naturally to help protect the skin underneath them", says the American Academy of Dermatology. The NHS lists the usual causes: high heels, uncomfortable or wrong-sized shoes, "not wearing socks with shoes", a problem with the bones of the foot, and "losing fat on the bottom of your feet as you get older". The APMA adds that a mild callus that is not bothering you "can probably be left alone".
Protective, but only up to a point. In 17 people with diabetes, removing 43 calluses from under the forefoot cut the peak pressure on those spots by 26 percent, and the authors concluded that a callus "may act as a foreign body elevating plantar pressures" (Young and colleagues, 1992). The diabetic foot guideline describes the loop: high stress makes thickened skin, and "the callus then leads to a further increase in the loading of the foot" (IWGDF practical guidelines, 2023). Our reading: both are true at different thicknesses, which is why both say to reduce a thick callus rather than let it build.
The AAD recommends creams with urea, salicylic acid or ammonium lactate; the trials behind them are of dry skin, not callus. In 25 people with moderate to severe dry skin, 18 of whom finished, a 40 percent urea cream beat a 12 percent ammonium lactate lotion on roughness, cracks, thickness and dryness at two weeks (Ademola and colleagues, 2002). In 70 people with dry feet, one foot treated with 5 percent salicylic acid and 10 percent urea and the other with ammonium lactate, both improved and neither won; only 39 were assessed at four weeks (Jennings and colleagues, 1998). The one study we found on thickened skin, hyperkeratosis, is ten patients using a 30 percent urea foam for 28 days with no comparison group (Goldstein and Gurge, 2008), and a PubMed search for urea and plantar callus returned nothing. Our reading: urea creams are cheap and reasonable, and nobody has shown in a fair trial that they shrink a callus.
Acid plasters have one good trial, on corns: in 202 adults, 40 percent salicylic acid plasters resolved 34 percent of corns at three months against 21 percent for a podiatrist's scalpel (Farndon and colleagues, 2013), though a reanalysis allowing for people with several corns found no significant difference in how soon they came back over the year (Stephenson and colleagues, 2016). People with diabetes, poor circulation or nerve damage were excluded. The APMA warns that some over-the-counter treatments "can lead to burns or even foot ulcers", and the diabetic foot guideline says: "Do not use chemical agents or plasters to remove corns and calluses".
It grows back if the cause stays: most calluses "gradually go away when the friction or pressure causing them stops" (AAD), and more treatment "may be needed if the corn or callus recurs" (APMA). The claim that filing makes a callus grow back thicker is repeated online, and we found no study that tested it. The nearest evidence points the other way, weakly: in 24 people with diabetes treated by podiatrists, the weight of callus removed was much the same at a first-ever visit as in people treated every three to four weeks (Pitei and colleagues, 1999). Our reading: had removal sped regrowth, that group would have had more to remove; the study was small and not designed for the question. Removal alone also eases pain less than you might expect. In 80 people aged 65 and over, a podiatrist's real scalpel debridement was compared with a sham, the blunt back of the blade scraped over the skin; pain fell in both groups, and the difference of 2 to 7 mm on a 100 mm scale was not significant at any point over six weeks (Landorf and colleagues, 2013). Our reading: taking the pressure off does the work that scraping alone cannot.
The podiatrists are blunt: "don't allow technicians to use a foot razor to remove dead skin", because a razor "can easily cause infection if too much skin is removed" (APMA). Some US states have written it into their rules. Texas forbids "razor-type callus shavers designed and intended to cut growths of skin such as corns and calluses, e.g., credo blades", and makes even keeping one on licensed premises a violation (16 Tex. Admin. Code § 83.112); its consumer leaflet adds that technicians may not use any procedure "that penetrates the skin layer". Georgia bans "any type of blade or microplane-like device or any type of device or implement whose purpose is to cut, scrape and/or shred the skin from the bottom of the feet" (Rule 130-5-.10), and requires salons to post a sign saying so. We read those two states' rules; others have similar ones that we have not checked.
Yet a podiatrist will shave a large callus with a surgical blade, which the APMA calls the most effective way to reduce it, "painless because the skin is already dead". Our reading: the rules do not contradict each other. Both are blades; what differs is the training, and someone who has examined the foot and knows when to stop. The worst cases in the literature sit on that line: a person with diabetic nerve damage who developed "limb-threatening lesions" after using a Ped Egg pedicure device on their own feet (Zhubrak and colleagues, 2013), and a 49-year-old with uncontrolled diabetes who developed necrotising fasciitis after a plantar callus was removed at a pedicure (Pozzi and colleagues, 2022); two case reports prove no rate, but both were in people with diabetes. What a pedicure can safely do is what you can do at home: pumice, a foot file or a scrub after a soak, "to gently smooth calluses" (APMA). A sheet from the US EPA and the CDC says "broken skin (e.g., cuts and abrasions) should not come into contact with foot spa water" (EPA and CDC, 2016); our reading is that a callus filed until it bleeds counts. The footbath studies are on our pedicure page.
In 63 people with diabetic nerve damage followed for about 15 months, an ulcer was 11.0 times more likely to form under a callus, against 4.7 times for an area of high pressure and 56.8 times on the site of an old ulcer (Murray and colleagues, 1996); removing callus in podiatry clinics lowered peak pressure by about a quarter to a third (Young; Pitei). The 2023 guideline of the International Working Group on the Diabetic Foot therefore recommends treating "excess callus", which it defines as callus a trained professional judges to need removing, in people with diabetes at risk of foot ulcers: a strong recommendation on very low-certainty evidence, since the benefit "has not been directly investigated". And it says these treatments "do have the potential to harm when improperly performed, and should therefore only be done by an appropriately trained healthcare professional" (Bus and colleagues, 2023). Our reading: a spa therapist is not that professional, ours included. See a podiatrist for the callus; our page on massage with diabetes covers what else to tell a therapist.
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No source we read says how fast a callus forms. The NHS lists "not wearing socks with shoes" among the causes and "do not walk long distances or stand for long periods" among its don'ts; the diabetes guideline tells people at risk to avoid thin-soled slippers. Our reading: long days on hard streets in thin sandals are that kind of pressure, so wear cushioned shoes for the long walks. We are 3.2 km from the Old Town, and a bicycle or taxi saves your feet the walk in. A heel that hurts deep inside rather than on the skin is a different problem, covered on our plantar fasciitis page.
The special foot treatment is 90 minutes of "20 min massage & herbal foot soak, nail & cuticle trim, heel scrape & foot moisturising"; the Luxury Gel pedicure is a 10-minute herbal foot soak, a 20-minute scrub and a 20-minute "scraping massage" before gel polish. The scrape works on hard skin, not the fascia underneath. We have not published what tool the scrape uses, a pumice stone, a file or a blade, or whether guests with diabetes are scraped at all. Until we do, ask before you book, and leave the scrape out if the answer is a blade, as the APMA advises at any salon. Tell us about diabetes, numb feet or poor circulation on the consultation form, which asks what to focus on and what to avoid. If any of those apply, see a podiatrist for the callus, and book us, if at all, for the massage and the colour without the scrape.
| Treatment | What the menu says | Price |
|---|---|---|
| Special foot treatment, 90 min | 20 min massage and herbal foot soak, nail and cuticle trim, heel scrape, moisturising | 650,000₫ |
| Luxury Gel polish | Herbal foot soak 10 min, scrub 20 min, scraping massage 20 min + gel polish | 950,000₫ |
| Gel pedicure | Cut + gel polish | 450,000₫ |
| O.P.I pedicure | Cut + polish | 300,000₫ |
| Foot massage, 60 or 90 min | Pressure work on the feet and calves | 450,000₫ / 600,000₫ |
Prices per person, read from our live spa menu on 3 November 2026; at the 26,000₫ rate we use across the site, the special foot treatment is about US$25, the Luxury Gel about US$37, a gel pedicure about US$17 and an O.P.I pedicure about US$12. The menu lists no scrape in the plain pedicures, which are a cut and polish, or in the foot massage. The nails page has the full nail menu and the foot massage page compares the foot treatments.
We found no randomised trial of urea or any cream on foot calluses, only on dry skin, and no study of whether removing a callus makes it grow back thicker. The one sham-controlled trial of scalpel removal followed older people for six weeks. The best trial of acid plasters was on corns and excluded people with diabetes. The diabetes recommendation to remove callus rests, by the guideline's own grading, on very low-certainty evidence, and we found no study comparing salon filing with podiatry. We have not measured anything on our own guests, and we have not published the tool our heel scrape uses. We are a hotel spa, not a podiatrist: with diabetes, numb feet, poor circulation, or a callus that bleeds or hurts, see one.
Nghê Prana Riverside Hotel & Spa, Hẻm 384 Nguyễn Tri Phương, Cẩm Nam, Hội An, on the Thu Bồn, 3.2 km from the Old Town. The spa is open from 9:00 to 21:00 every day and takes visitors as well as hotel guests. Book on the online form or by phone or WhatsApp on +84 896 687 961; an hour's notice is enough, and walk-ins are welcome when the room is free. Come with your legs unshaven for a day, ask what the heel scrape uses before you book it, and tell us at the consultation about diabetes, numb feet or anything you want us to avoid. Coming as two? Foot treatments side by side fit in the private room on the couple spa page.
Sources: AAD, corns and calluses and pedicure safety; NHS, 28 July 2026; APMA, corns and calluses and Pedicure Pointers; US EPA and CDC, November 2016; Bus SA et al. and Schaper NC et al., Diabetes/Metabolism Research and Reviews 40(3), 2024; Murray HJ et al., Diabetic Medicine 13(11), 1996; Young MJ et al., Diabetic Medicine 9(1), 1992; Pitei DL et al., J Foot Ankle Surg 38(4), 1999; Landorf KB et al., Trials 14, 2013; Farndon LJ et al., J Foot Ankle Res 6, 2013; Stephenson J et al., J Dermatol 43(6), 2016; Ademola J et al., Am J Clin Dermatol 3(3), 2002; Jennings MB et al., JAPMA 88(7), 1998; Goldstein JA and Gurge RM, J Drugs Dermatol 7(2), 2008; Zhubrak MS et al., JAPMA 103(5), 2013; Pozzi M et al., Acta Biomed 93(S1), 2022; 16 Tex. Admin. Code § 83.112 and TDLR, October 2022; Georgia Rules 130-5-.05 and 130-5-.10. All read 3 November 2026; prices from the Nghê Prana spa menu the same day.
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Book your staySoak the skin in warm water for 5 to 10 minutes, rub it down gently with a pumice stone or foot file, moisturise every day (urea, salicylic acid or ammonium lactate creams), and take the pressure off with better shoes or padding (AAD; NHS; APMA). Do not cut or shave it yourself (NHS).
America's podiatrists (APMA) say not to let technicians use a foot razor. Texas bans credo blades and other razor-type callus shavers in salons, even keeping one on the premises (16 TAC 83.112), and Georgia bans any device that cuts, scrapes or shreds skin from the bottom of the feet (Rule 130-5-.10).
No study has tested it. A callus does come back while the pressure that made it continues. In one small study of people with diabetes, regular podiatry removal every 3 to 4 weeks yielded about the same weight of callus as a first visit (Pitei 1999), which argues weakly against faster regrowth.
Dermatologists recommend them, but no randomised trial has tested urea on foot callus; the trials are on dry skin (Ademola 2002, 40% urea; Jennings 1998, 70 people, no difference between creams). Salicylic acid plasters have one good trial, on corns, which excluded people with diabetes (Farndon 2013).
No. The NHS says do not treat it yourself, and the IWGDF 2023 guideline says callus removal should only be done by an appropriately trained healthcare professional. In people with diabetic nerve damage an ulcer was 11 times more likely under a callus (Murray 1996). Do not use corn plasters or acids.
The special foot treatment (650,000 VND, 90 minutes) includes a heel scrape, and the Luxury Gel pedicure (950,000 VND) a 20-minute scraping massage (live menu, 3 November 2026). The tool used and whether guests with diabetes are scraped are not yet published; with diabetes, numb feet or poor circulation, see a podiatrist and skip the scrape.
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