Why do my nails look like this, and is it even psoriasis?
It can be, and it's easy to mistake for something else. The American Academy of Dermatology page I read lists a specific set of signs that point to nail psoriasis rather than a fungal infection or ordinary nail damage. Evidence
- Tiny dents in the nail, called nail pits.
- Discoloration: white, yellow, or brown.
- Crumbling or thickened nails.
- The nail separating from the finger or toe.
- Debris building up under the nail.
- Blood under the nail.
Why this matters
- Sources cited, not yet graded
Pitted, crumbling or lifting nails get mistaken for fungus, and that mix-up is one of the questions psoriasis readers ask most. Nail psoriasis can show up years after psoriasis first appears on the skin, or it can appear on its own with no skin patches at all.
Considerations
- Depends on you
Several of these signs, especially discoloration and crumbling, also happen with nail fungus and other nail conditions. The source describes the signs. I looked for a way to tell them apart without a clinician examining the nail, and the page gives none.
Questions for your dermatologist
Is this nail psoriasis, a fungal infection, or both at once?
Saving keeps this on your device and needs JavaScript, which is off in this browser.What does a nail change like this tell you about how my skin or joints are doing?
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What actually treats nail psoriasis, and how long does it take?
Nails grow slowly, so nail psoriasis responds slower than skin psoriasis does. I read the AAD on the treatment paths, and it describes a few different ones. It's common to need more than one. Evidence
- Topical treatment (strong corticosteroids, calcipotriol, or tazarotene), used daily for 6 months or longer.
- Corticosteroid injected into or near the nail, roughly every 4 to 6 weeks.
- Systemic medication (a biologic, methotrexate, acitretin, cyclosporine, or apremilast) when both skin and nails are severely affected.
- Laser therapy, which the AAD calls under-researched.
Why this matters
- Sources cited, not yet graded
The timeline is the part I would hold on to. Clearing debris from under the nail typically takes six months or longer on its own, because that is roughly how long it takes the nail to grow out.
Considerations
- Depends on you
I compared the options, and the source ranks none of them against another. It does not say which one a given person should start with, and it gives no success-rate numbers.
Questions for your dermatologist
Which of these would you start with for me, and why?
Saving keeps this on your device and needs JavaScript, which is off in this browser.How will we know in a few months whether it is working, given how slowly nails grow?
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Is there a habit that helps while treatment works?
Yes. None of this replaces a treatment plan. The AAD page I read says combining a treatment plan with these habits makes improvement more likely. Evidence
- Keep nails short, to reduce lifting and buildup underneath.
- Wear vinyl or nitrile gloves for wet or manual work.
- Moisturize hands regularly, including within about three minutes of bathing.
- Leave cuticles alone instead of cutting or pushing them.
- Don't bite or pick at your nails.
- Don't scrape debris out from under the nail; treatment clears it gradually.
- Skip artificial nails; polish and gentle buffing are fine.
Why this matters
- Sources cited, not yet graded
The reasoning behind several of these is the same, and I went looking for it. Drying out or injuring a nail, including a cuticle injury, can worsen nail psoriasis or trigger a new flare there.
Considerations
- Depends on you
I could not find a figure for how much any single habit changes the odds of improvement on its own, separate from treatment.
Questions for your dermatologist
Is there anything else specific to my nails I should be doing or avoiding?
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Evidence behind this page
Sources
Each evidence badge opens the source and its limits. The full list stays available here.
- American Academy of DermatologyPatient education · Patient education, tier 5Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
What this source supports
Supports tiny dents (nail pits) and white-yellow-brown discoloration as signs of nail psoriasis. Supports crumbling or thickened nails and nails separating from the finger or toe as signs. Supports debris and blood under the nail as signs. Supports that it can appear years after skin psoriasis or on its own. Supports a topical treatment (a strong corticosteroid, calcipotriol, or tazarotene) needing 6 or more months of daily use. Supports corticosteroid injections into or near the nail every 4 to 6 weeks. Supports systemic medication (a biologic, methotrexate, acitretin, cyclosporine, or apremilast) for severe skin-and-nail disease. Supports that laser therapy is under-researched. Supports that results are slow because nails grow slowly. Supports that clearing debris typically takes six months or longer, and that many people need to try more than one treatment or a combination.
What it does not support
Does not rank the treatment options against each other or say which one a given person should start with. Does not give success-rate numbers for any option.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.
- American Academy of DermatologyPatient education · Patient education, tier 5Independent source
- Published
- SteadySkin last checked
What this source can and cannot tell you
What this source supports
Supports keeping nails short to reduce lifting and buildup. Supports wearing vinyl or nitrile gloves for wet or manual work, since drying or injuring a nail can worsen nail psoriasis or trigger a flare. Supports moisturizing hands regularly, including within about three minutes of bathing. Supports leaving cuticles alone rather than cutting or pushing them, to avoid an injury that can trigger a flare (the Koebner phenomenon). Supports not biting or picking at nails. Supports not scraping buildup out from under the nail, since treatment clears it gradually and scraping raises infection risk and can loosen the nail further. Supports skipping artificial nails, since artificial nails raise the risk of the nail separating from the finger or toe, though nail polish and gentle buffing are fine. Supports that combining a treatment plan with this nail care makes improvement more likely.
What it does not support
Does not quantify how much any single habit changes the odds of improvement, and does not replace a treatment plan on its own.
Claim-specific review for this source is still in progress. Only the source-level evidence and limits are shown here.