Therapeutic pedicure in Coimbra
Thick or deformed toenails in Coimbra
Onychauxis, onychogryphosis and pincer nail
Nails that thicken or change shape become impossible to cut at home and hurt inside the shoe. With the right instruments they become thin, short and comfortable again — and the reason for the change is looked into.
What it is
Toenails thicken (onychauxis) or become deformed for several reasons: repeated trauma from shoes or sport, age, fungus, psoriasis, poor circulation or years without proper cutting. In its most extreme form, onychogryphosis, the nail grows thick and curls like a ram’s horn.
Another common deformity is the pincer nail: the plate curves excessively from side to side, squeezing the nail bed and causing pain, sometimes intense, even without ingrowing. All these changes have in common that the nail is hard to cut with ordinary scissors, hurts in shoes and often hides debris or fungus underneath.
Signs and symptoms
- A thick, hard nail that scissors cannot cut or that breaks irregularly.
- Yellowish, brownish or opaque colour, with ridges or an uneven surface.
- A curved, curled or crooked nail, claw- or pincer-shaped.
- Pain in shoes or when bearing weight, especially in closed shoes.
- Whitish debris built up under the nail, or lifting.
- Pain along the side edges of a very curved nail, even without inflammation.
Most common causes
- Repeated microtrauma: tight or short shoes, running, football, claw toes rubbing on the shoe.
- Age: the nail grows more slowly and thicker.
- Onychomycosis (fungus), the most common cause of thickening — and one worth confirming.
- Psoriasis, eczema and other skin conditions that affect the nail.
- Poor circulation in the legs and feet, diabetes, thyroid disease.
- A hard knock that damaged the nail root (matrix), or years without technical cutting.
How it is treated
At the appointment the nail is cut and thinned with a micromotor and dedicated burrs, down to a comfortable thickness and length, and the debris underneath is cleaned out. It is painless and relief inside the shoe is immediate. For very thick or curled nails, regular technical cutting every 6 to 10 weeks is how they are kept under control.
If the nail is curved or pincer-shaped and hurts at the edges, a nail brace — a spring or band bonded to the nail that straightens it as it grows — corrects the curvature progressively and painlessly, with periodic maintenance.
As a nail change always has a cause, footwear, circulation and skin are assessed and, when fungus or psoriasis is suspected, you are referred for confirmation and medical treatment in parallel.
What happens at the appointment
- 1Assessment of the nail, the skin and the likely causes; referral for a mycology test when fungus is suspected.
- 2Technical cutting and thinning of the nail with a micromotor, painlessly.
- 3Cleaning of the grooves and the debris under the nail.
- 4Fitting of a nail brace for curved or pincer nails, when indicated.
- 5Footwear advice and a regular maintenance plan.
What you can do at home
- Shoes with a high, roomy toe box that do not press on the nail from above or in front; socks that do not squeeze.
- Cut nails straight across after bathing, when they are softer; if you cannot cut them safely, do not force it — that is what technical cutting is for.
- Keep nails short and feet dry; moisturise the surrounding skin, but do not let cream build up under the nail.
- Do not use coarse files or blades to thin the nail at home.
- If you play sport, check your shoe length: there should be a finger’s width of space at the front.
When not to wait
Book without delay — or see a doctor — if you notice any of these signs:
- Intense pain, redness or pus around the nail.
- A dark or black streak under the nail not caused by a knock, or a nail changing colour irregularly: it should be assessed by a doctor.
- You have diabetes or poor circulation: thick nails injure the skin and can cause wounds; cutting should be done by a professional.
- The nail lifts from the bed or stops growing.
Frequently asked questions
Is a thick nail always fungus?+
No. Trauma, age, psoriasis and poor circulation also thicken the nail, and they are often confused. When fungus is suspected, it is best to confirm with a test before starting a long antifungal treatment.
Will the nail become thin again?+
If the cause is reversible — footwear, an old injury, treated fungus — the new nail can grow normally, which takes 9 to 12 months. If the matrix was permanently damaged, or with age, the nail will keep growing thick and regular technical cutting is what keeps it comfortable.
Does technical cutting hurt?+
No. The nail has no sensation and the micromotor thins it in a controlled way, without heating or injuring the skin. You leave with short, thin nails and no pain in your shoes.
Does the brace work for pincer nails?+
Yes, it is one of its main indications. The brace applies a gentle, continuous force that opens the curvature as the nail grows, relieving pressure at the edges. It is followed up with maintenance visits to adjust the tension.
This information is general and meant to help you understand the problem. It does not replace an individual assessment or medical follow-up. If in doubt, book an appointment. Content reviewed by Priscila Arantes, registered nurse (Ordem dos Enfermeiros no. 117508).
Other problems we treat
Nail fungus
Yellow, thick, brittle nails are not just cosmetic: they are an infection that, untreated, spreads to the other nails. Debridement and laser treat the nail; patience does the rest — a new nail takes months to grow.
Learn more →Ingrown toenail
An ingrown toenail is not fixed by cutting deeper. At the appointment the fragment that is hurting is removed, the inflammation is treated and, when the shape of the nail is the cause, a brace corrects it so it does not return.
Learn more →Podiatric risk
With diabetes, and other conditions that affect circulation or sensation, the feet need monitoring even without complaints — because the problem is often that you stop feeling. The appointment is there to see what you cannot feel and to treat safely what would be a risk at home.
Learn more →Corns and calluses · Plantar wart · Cracked heels and fissures · Wounds and dressings