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Healthy Nails Start with the Right Diagnosis!
Why Do I Have Horizontal Ridges on My Toenail? Dent in My Toenail?
Do you have a horizontal ridge on your toenail? This can look like a dent in the toenail. We go over what causes these horizontal ridges!
What Do Horizontal Ridges on Toenails Mean? Here’s What You Need to Know
Noticing horizontal lines or ridges across your toenails? These indentations—also known as Beau’s lines—can signal a variety of health issues. From temporary stress on the body to chronic conditions like diabetes or nutritional deficiencies, these nail changes are often a symptom of something deeper. At Balance Foot & Ankle Specialist, we help patients in Michigan decode these signs and offer solutions for healthy, clear nails.
Understanding the Causes and Treatment for Horizontal Toenail Ridges
Horizontal ridges can appear as indented lines or grooves running across the nail and may affect one or multiple toes. These ridges form when nail growth is temporarily interrupted. Common causes include:
Illness or high fever (flu, COVID-19, infections)
Physical trauma to the nail bed
Severe stress or shock to the body
Nutritional deficiencies (zinc, protein, B vitamins)
Chemotherapy
Skin conditions like eczema or psoriasis
Uncontrolled diabetes or circulation issues
Fungal infections
Systemic diseases or autoimmune disorders
Side effects of certain medications
If you notice horizontal ridges, it’s important to monitor for additional symptoms like discoloration, brittleness, or pain—these signs may help pinpoint the underlying cause.
Toenail Pain (Toenail Fungus, Ingrown Toenails, Discolored Toenails)
Worried About Toenail Ridges? Let a Specialist Take a Look!
Horizontal toenail ridges may be more than a cosmetic concern—they could signal an underlying health issue. At Balance Foot & Ankle Specialist, our podiatrists take the time to uncover the root cause and create a customized care plan. Don’t ignore nail changes—early diagnosis means faster treatment and peace of mind.
Dent in the Toenail or Horizontal Ridge in The Toenail
What Causes Horizontal Ridges on Toenails:
- If you notice a horizontal ridge across your toenail or a dent in your toenail?
- Don’t worry. This is not a reason to panic.
- This horizontal deformity or dent is something called Beau’s line. Horizontal ridges or Beau’s lines are usually caused by trauma or damage to the toenail.
- These horizontal ridges are really depressions in your toenail that look like a big dent from side to side.
- This should not be confused with the vertical dent line, as this could mean different things.
- Beau’s lines can occur on both your toenails and your fingernails. They are usually associated with white marks or white lines that appear horizontal.
- A person could have several Beau’s lines or horizontal lines along with their toenails.
- They are usually caused by an injury or repeated damage to the toenails or fingernails.
- This minor trauma or damage interrupts the growth of the toenail or fingernail for a short period of time. This can result in a deep ridge or dent from side to side of the nail.
Common Causes of Horizontal Ridges And Dents on the Toenails Include:
- Dropping something heavy onto the toenail.
- A period of long-distance running.
- A period of standing at work or going on long walks.
- Jamming the toenail against the front of your shoe or bumping it against something.
- A period of heavy walking or standing.
- A period of heavy running and damage to the toenails.
- You could also get these horizontal lines from cold damage to your toes, which would stop the toenails from the groin for a short period of time.
- There are other metabolic or disease-related causes of these ridges or dents, but they are less common.
Rare But Serious Causes of Horizontal Ridges Include:
- There are more serious causes of dents in the toenails or horizontal ridges on the toenails and fingernails.
- These more serious causes would indicate an issue with your body being able to grow tissues where toenail.
The more serious causes include:
- Chemotherapy or radiation.
- Vitamin deficiency.
- Mineral deficiency.
- Malnutrition.
- Zinc deficiency.
- Calcium deficiency
- Diabetes with an uncontrolled period.
- Peripheral arterial disease.
- Chronic smoking.
- Chemotherapy secondary to cancer.
- Radiation secondary to cancer.
- A serious illness like pneumonia.
- Thyroid problems.
- Hypothyroidism.
- Hyperthyroidism.
What Seasons Are Horizontal Ridges or Dents on the Toenails Most Common?
- Studies show that toenails and fingernails can grow about 50% slower in winter than in summer.
- This could very easily be because a horizontal line or Beau’s lines develop.
- This is because people don’t go outside as much, they don’t move as much, and they don’t get as much vitamin D.
- There is also more incident of flu, less movement, and more time spend indoors being inactive.
What Else Can Horizontal Ridges on the Toenails Mean?
- The American Academy of Dermatology states, “nails often reflect your general state of health.
Changes in the nail such as discoloration or thickening can signal health problems or changes.”
Horizontal Ridges on Toenails Pictures:
These pictures also include dent on the toenail pictures.
What if I have horizontal ridges on toenails due to a thyroid problem?
- Thyroid diseases such as hyperthyroidism or hypothyroidism may cause toenail and fingernail problems.
- Significant hypothyroidism or an episode may cause a horizontal depression in the toenail.
- There is an association with hypothyroidism and dents in the toenail or horizontal ridges in the toenail.
Can surgery cause horizontal depressions or dents in the toenail?
- This severe illness or surgery can slow down your metabolism and body’s recovery if there is this severe illness.
- This is considered a state of trauma for your body where the toenail stem cells are not fully functioning.
- This could result in a temporary slow down in the groin of your toenails.
- This can cause a dent or ridge in the toenail.
Why Do I Have a Horizontal Dent in my Big Toenail?
- If you have just one horizontal dent in the big toenail and no other toes, this is likely due to trauma to the big toe.
- This is actually very common in this depression or ridge is due to nail trauma.
- If the toenail gets impacted backward or damage, it can stop the nail matrix from growing new nails for a short period of time.
- This is long enough to cause a disruption or deformity in the nail.
- It would be rare for just 1 toenail ridge or dent to be associated with any systemic disease.
- If you are worried, always check with your podiatrist and evaluate, although the risk for toenail cancer or systemic disease is fairly low.
Why Is There a Dent in My Toenail?
- The most common cause for a dent in your toenail is minor trauma or injury.
- This is most commonly called Beau’s line.
What If I have a Vertical Dent in the Toenail?
- A vertical dent can still be commonly caused by trauma, but sometimes it can be something more significant.
- There is something called the Hutchinson sign, which can be associated with toenail melanoma.
- If you have a vertical line over 3 mm wide, this can be called the Hutchinson sign and can be associated with subungual melanoma.
- There are increased signs of toenail cancer if it extends into the skin outside the toenail.
- This is extremely rare but always check with your podiatrist for a toenail biopsy if there is a concern.
Why Does My Toenail Have a Dent In It?
- As mentioned above, the most common cause of this toenail depression or deformity is due to minor trauma.
- Watch the associated video on this page to see how long it will take to go away!
Dent and Horizontal Ridge in the Toenail Treatment Video
- Unfortunately, the best treatment is to grow a new healthy nail! This video goes over how to grow back a damaged toenail.
Deformed or indented toenail treatment video summary:
How long does it take for a toenail to grow back after falling off?
- It can take a long TIME, but we show you what makes your nail grow back faster!
- A toenail can grow 1mm or less or not at all if not treated properly.
- There are 5 things that you can do to make your toenail grow back faster if you fall the tips we go over!
- If your toenail fell off: We go over supplements, how to treat your toenail that fell off if you want to grow long nails faster!
- Check our top 5 tips for making your nail grow fast!
Horizontal Ridges on Toenails: 7 Causes & Best Treatment
Noticing horizontal ridges on your toenails? These ridges, also known as Beau’s lines, are more than just a cosmetic concern—they can be a sign of an underlying health issue or trauma affecting your nail growth.
7 Common Causes of Horizontal Toenail Ridges
Injury or Trauma – A stubbed toe or repeated pressure from tight shoes can interrupt nail growth, forming a ridge.
Severe Illness or High Fever – Conditions like COVID-19, pneumonia, or other serious illnesses can temporarily halt nail production.
Nutritional Deficiencies – Low levels of zinc, biotin, or iron may contribute to poor nail health and horizontal ridges.
Chemotherapy or Radiation Therapy – These treatments often slow or pause nail matrix activity, leading to visible lines.
Uncontrolled Diabetes – Fluctuations in blood sugar levels may impact the nail bed and growth cycle.
Peripheral Vascular Disease – Poor blood flow in the lower limbs can result in brittle or ridged nails.
Autoimmune Conditions – Diseases like lupus or psoriasis can disrupt nail formation and cause ridging.
Best Treatments for Horizontal Ridges
See a podiatrist or dermatologist: Early evaluation can rule out serious health problems.
Moisturize regularly: Use creams with urea or lactic acid to keep nails hydrated.
Wear properly fitting shoes: Prevent trauma by ensuring your footwear doesn’t compress the toes.
Improve your diet: Incorporate foods rich in biotin, iron, and zinc.
Address the underlying condition: Treating systemic issues like diabetes or vascular problems is key to preventing recurrence.
Problems Our Podiatrist Can Help With
- Toenail Fungus Treatment (Oral or Laser ).
- Toenail Trimming.
- Orthotics Fitting.
- Ingrown Toenails.
- Infected Ingrown Toenails.
- Podiatrist pedicure or medical pedicure.
- Trimming of Corns, Trimming of Calluses, and Treatment of Pressure Blisters.
- Diabetic Foot Care & Diabetic Foot Wounds.
- Athletes Foot, Dry Skin, Eczema.
- Foot & Ankle Ulcer Care.
- Infection and Abscess Care.
- Staph Infections in the Toe or Foot Treatment.
- Treatment of Plantar Warts for Your Toes and Feet.
- Foot & Ankle Injections (Steroid or Natural Solutions.)
- Management of Foot & Ankle Fractures (Walking Boots for broken toes or broken feet).
- Heel Pain (Heel Spur or Plantar Fasciitis).
- Custom Orthotics for children and adults (In the office).
- Over the Counter Orthotics for children and adults.
- Podiatrist medical pedicure.
- Extra-Depth Shoes for Patients with Diabetes.
- Diabetic Shoes.
- Gout Treatment.
- Prescription (Refills).
- Telehealth appointments.
- Shockwave therapy (AKA ESWT or EPAT therapy)
- Cold laser therapy (In the office).
- MLS laser therapy (Multi-Wave Locked System laser therapy).
- Laser for peripheral neuropathy (In-Office).
- Senior Toenail Cutting & Toenail Trimming Services.
Procedures our Podiatrists Can Perform in the Office:
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Horizontal Ridges on Toenails – Frequently Asked Questions
They are often referred to as Beau’s lines and indicate interrupted nail growth.
Yes, they may reflect past illness, malnutrition, or systemic issues.
Yes, both physical and emotional stress can interrupt nail growth and form ridges.
- Patients frequently ask, “why do my toenails have horizontal ridges?”
- The most common answer to that question is that standard trauma or disruption in the growth of the toenail can happen.
- This could result in a dent in the toenail or a deep ridge in the toenail.
- This is a harmless and common problem.
- There could also be a lower chance of some metabolic disease or disruption occurring.
- A dent in the toenail or this horizontal ridge is usually associated with a metabolic disruption.
- This may signal a more significant illness like pneumonia or a diabetic episode or having the flu, or potentially Covid-19 may be an example.
- At this point, your body was focused on healing your body and could not grow a new toenail.
The most common cause of white horizontal ridges on the toenails is a small amount of trauma.
If you have a horizontal white dent in the toenail or a horizontal white ridge on the toenail, this is likely due to damage.
The white mark is due to toenail damage, which could be associated with a ridge due to a slow down or deformity in the nail.
If horizontal ridges are associated with redness or a black line, dry blood is most likely associated with your horizontal ridge.
The deep horizontal ridges on the big toenails only are very common.
This is because your big toenails are your longest toes, and they are most likely to rub or bump against the front of your shoe.
For example, if you are training for a marathon or standing on your feet all day at a job, this can cause your big toenails to absorb the majority of the pressure.
The best treatment for this is to keep your toenails trimmed, get a good shoe, get a good orthotic, and take good care of your feet.
- If you have horizontal ridges in both the fingernails and the toenails, this may symbolize metabolic disease.
- If you have a systemic disease like thyroid problems, diabetes, pneumonia, or recent flu or illness, this may explain the problem.
- If you have heart issues, kidney issues, or lung issues, this could also explain deep horizontal ridges and deep dense in the toenails.
- A good way to think about it is that the toenail problem does not indicate the disease, but that the disease can cause a slow down in your health, which can then cause a dent.
- It is tough to correlate a dent in the toenail to a specific disease, but rather the dent in your toenail should be correlated to a slow down in your overall metabolism for a short period of time.
- In our experience, this is still most likely due to trauma.
Fungal infections usually cause discoloration and thickening, but sometimes also lead to ridges.
Uncontrolled diabetes can cause circulation issues that impact nail growth, potentially resulting in ridges.
- Due to gravity and having to stand all day, it is much more likely that you will suffer trauma to your toes rather than your fingers.
- Our experience is much more common for the toenails to have a deep horizontal ridge where a dent in the toenails than the fingernails.
- This is not just due to bumping but can be associated with long periods of standing or bruising to the toes.
- This is more common than one might think, as we have just gotten used to our feet being bruised and sore all the time.
- But our feet are not designed to take unlimited damage.
- This can result in disruptions in nail growth.
Toenails grow slowly; ridges may take 6–12 months to fully grow out.
Yes, especially if they are sudden, severe, or accompanied by other nail or health symptoms.
Deficiencies in zinc, iron, biotin, and protein may lead to nail changes.
Maintain a healthy diet, manage stress, avoid trauma, and treat any infections or illnesses early.
Balance Foot & Ankle Specialist in Howell & Bloomfield Hills, Michigan provides expert care for toenail and foot health issues.
