Vertical nail ridges are often a normal part of aging, but they can also appear with dry skin, eczema, thyroid disease, injury, or certain nutrient deficiencies. If your ridges are new, deep, splitting, or joined by a color or shape change, the useful next step is to note the full change and prepare questions for a qualified professional.
These up-and-down grooves are also called longitudinal ridges. They are different from horizontal dents, and the difference matters because the two patterns can point to different questions.
What causes vertical ridges on fingernails?
Cleveland Clinic’s nail-ridge guide lists normal aging as a common cause of vertical ridges. It also lists very dry skin or eczema. The same guide says hypothyroidism can be associated with thick, brittle nails that have vertical ridges and may crumble or break more easily.
Vertical ridges with splitting or easy breakage are sometimes described as onychorrhexis. WebMD’s overview of onychorrhexis describes vertical grooves, brittle nails, edge splitting, aging, nail trauma, strong chemicals, and several health conditions as possible contributors. That list is a reason to look at the whole pattern, not to diagnose a cause from one nail feature.
| What you notice | What it can raise a question about | Useful next move |
|---|---|---|
| Vertical ridges only | Normal aging, dry skin, or eczema | Observe the pattern and mention new changes at a routine visit. |
| Vertical ridges plus brittleness or splitting | Nail-matrix changes, trauma, chemicals, thyroid disease, or nutritional questions | Bring a timeline and a list of other changes to a qualified professional. |
| Horizontal dents across the nail | Beau’s lines, which can follow an interruption in nail growth | Discuss repeated or new lines with a qualified professional. |
| A solitary black vertical streak | A pigmented nail change that needs assessment | Arrange professional evaluation rather than trying to identify it from appearance alone. |
What deficiency causes vertical nail ridges?
Iron deficiency is the nutrient issue most directly connected to vertical ridges in the material here. Cleveland Clinic says iron deficiency can be associated with vertical ridges and koilonychia, or spoon-shaped nails. It also says zinc deficiency can cause Beau’s lines and white spots, which are not the same as ordinary vertical ridges.
WebMD lists low iron, protein, or folic acid among nutritional issues that can affect nail growth. It does not make vitamin B12 the specific answer to vertical ridges, so a ridge alone cannot tell you that you have a B12 deficiency. It also cannot identify which vitamin, if any, you need.
That is why a long ingredient list or a hair-and-nail product is not a substitute for figuring out the cause. Our hair and nail supplement evidence review explains the difference between a supplement claim and an outcome you can actually evaluate. If biotin is part of a product you are considering, read the biotin before bloodwork checklist before arranging laboratory testing.
What do liver failure or heart failure nails look like?
Vertical ridges do not provide a reliable visual test for liver failure or heart failure. WebMD lists liver disease and heart or circulatory conditions among possible contributors to onychorrhexis, but the page does not describe a specific nail appearance that identifies liver failure or heart failure. A nail change should be discussed alongside your broader symptoms and health history, not used as a diagnosis.
The same applies to B12 deficiency: this page cannot tell you that a ridge pattern equals B12 deficiency or describe a distinct “B12 nail.” If you are concerned about a deficiency or a medical condition, write down when the change began, which nails are involved, whether it is worsening, and any other symptoms to discuss with a qualified professional.
Are horizontal ridges different from vertical ridges?
Yes. Horizontal ridges or dents are commonly called Beau’s lines. Cleveland Clinic says they can occur when nail growth is interrupted, including after nail injury, long-term gel manicures or artificial nails, chemotherapy, peripheral vascular disease, or a severe illness with fever.
A single old line may grow forward with the nail. Repeated new Beau’s lines deserve a conversation with a qualified professional because the pattern may signal repeated interruptions in nail growth.
Can vertical nail ridges go away?
Whether ridges become less noticeable depends on the cause. Cleveland Clinic says that when an underlying cause is addressed, healthier nail growth may improve the appearance over time, and that nails take several months to grow out. If the ridges are related to normal aging, they may remain a cosmetic feature.
For an observation-only situation, it is reasonable to photograph the nails in the same light every few weeks and note whether the ridges, splitting, color, or nail shape changes. This gives you a clearer record without assuming you need to buy anything.
What foods get rid of nail ridges?
No food in the material here is shown to erase vertical nail ridges. Food may be relevant if a qualified professional identifies a nutritional deficiency, but the nail pattern itself does not identify iron, zinc, protein, folate, or B12 as the cause. If you are comparing nutrition products, our guide to hair and nail supplement claims helps separate growth, appearance, and deficiency-related questions.
Be especially careful with selenium-containing hair and nail products: our selenium checklist explains why more is not automatically better.
When should you worry about vertical nail ridges?
Tell a qualified professional about new ridges or lines, according to Cleveland Clinic. Its guide specifically says to mention changes in nail shape, including clubbing or spoon-shaped nails; white, green, yellow, or dark marks; nail pitting; and redness or swelling around one or more nails.
A black vertical streak needs particular attention. A 2021 case report indexed by PubMed described a rare Candida-associated black longitudinal streak, while also explaining that this appearance can mimic a pigmented tumor. In that report, nail testing and, where needed, biopsy were used to sort out the cause. A visible line cannot tell you which cause applies.
Before you book or buy anything
- Bring a timeline: when the ridges started, whether they are spreading, and whether splitting or breakage came first.
- Note whether the change is on one nail or many, and whether you also see dents, dark marks, color changes, swelling, or a changed nail shape.
- Ask which possible causes fit your full history and whether testing is appropriate before choosing a supplement.
- If the concern is a dark vertical streak, ask how the cause will be assessed rather than relying on photos or a cosmetic cover-up.
The most practical next step is to use this as a nail-change guide: compare your pattern with the distinctions above, prepare your questions, and choose observation rather than a purchase when there is no clear product question to solve.
By SkinCareSupplements.com Research & Editorial Team