If you’ve noticed your toenail cracked in half, you’re not alone. Cracked toenails are a common issue we see at the Foot & Ankle Center of Arizona, especially among active individuals or patients with underlying medical conditions. While it may seem like a minor cosmetic flaw, a split or cracked toenail can cause pain, infection, and long-term nail damage if not treated properly.
In this post, we’ll explore what causes toenails to crack, how to treat them, and most importantly, how to fix a cracked toenail—whether your big toenail cracked vertically or big toenail cracked horizontally.
What Does It Mean If a Toenail Cracks?
A toenail crack can appear in different ways:
- Vertically, from the tip toward the cuticle
- Horizontally, from one side of the nail to the other
- Down the middle, splitting the nail in half
Cracks in the big toenail are particularly troublesome due to the nail’s size and pressure from footwear. If your big toenail cracked vertically, the nail may remain partially attached, posing a risk for infection and further tearing. When your big toenail cracked horizontally, it may feel unstable and painful, especially when walking or wearing shoes.
Common Causes of Cracked Toenails
1. Trauma or Repetitive Pressure
Stubbing your toe, dropping something on it, or long-distance running can lead to both horizontal and vertical cracks.
2. Fungal Infections
Fungal infections such as onychomycosis weaken the nail’s structure, making it prone to breaking and splitting.
3. Nutritional Deficiencies
A lack of biotin, iron, or protein in your diet can result in brittle nails.
4. Skin or Autoimmune Conditions
Psoriasis, eczema, and thyroid disorders can lead to weak or damaged nails.
5. Age and Dehydration
As we age, nails can dry out and lose flexibility, increasing the risk of cracking.
6. Improper Grooming or Manicures
Rough trimming or filing can weaken nail edges, especially on large toenails.
Symptoms to Watch For
- Sharp pain or tenderness under or around the nail
- Redness, swelling, or pus (indicating infection)
- Nail thickening, discoloration, or brittleness
- Nail bed exposure or partial detachment
If your big toenail cracked vertically, you may feel pressure or pain along the split, especially if it extends deep. A big toenail cracked horizontally can cause instability in the nail and increase the risk of the top part detaching.
How to Fix a Cracked Toenail at Home (Mild Cases)
Here’s how to fix a cracked toenail if the crack is minor and there’s no sign of infection:
Clean the Area
Wash with mild soap and warm water to remove dirt and bacteria.
Disinfect the Crack
Apply an antiseptic or antibiotic ointment to reduce infection risk.
Trim and File Gently
Clip any jagged or lifted edges carefully. Do not tear off any part of the nail.
Use Nail Glue or Medical Tape
For a temporary fix, use nail glue to hold the crack together. Cover with tape or a bandage to protect it from pressure.
Keep It Dry
Moisture can worsen nail conditions. Wear breathable socks and avoid soaking your feet.
Protect the Toenail
Use a toe cap or padded bandage when wearing shoes to reduce trauma to the area.
When to See a Specialist
While minor cracks may heal on their own, some cases require medical attention. You should see a podiatrist if:
- The nail split reaches the cuticle or base
- You experience persistent pain, swelling, or discoloration
- The nail detaches or bleeds
- You have diabetes or circulation issues
- There are signs of fungal infection or slow nail regrowth
Treatment Options at the Foot & Ankle Center of Arizona
Our Scottsdale-based clinic offers expert care for all toenail-related concerns. Some of our advanced treatment options include:
Fungal Toenail Laser Therapy
Our FDA-approved laser treatment targets and kills nail fungus without affecting the surrounding skin or tissue.
Matrixectomy (Partial Nail Removal)
For nails that are severely cracked or infected, partial removal can allow the nail to regrow cleanly and healthily.
Toenail Stabilization
We use medical-grade dressings and stabilization devices to promote healing while protecting the nail.
Custom Nail & Skin Care Plans
We provide guidance on long-term nail health through personalized treatment plans that include topical medications, nutrition, and foot hygiene.
Preventing Cracked Toenails in the Future
- Trim toenails straight across—avoid rounding or aggressive filing
- Wear comfortable, properly fitting shoes with a wide toe box
- Use antifungal powder or spray in shoes and on feet
- Avoid prolonged moisture exposure—keep feet dry and clean
- Nourish nails with proper hydration and nutrients
- Schedule regular foot care visits, especially if you’re at higher risk
Final Thoughts
A toenail cracked in half, whether vertically or horizontally, should never be ignored. Whether it’s from injury, fungus, or other health issues, understanding how to fix a cracked toenail and knowing when to seek professional help can make all the difference in your recovery.
At the Foot & Ankle Center of Arizona, we specialize in treating complex toenail conditions with advanced technology and compassionate care. If your big toenail cracked vertically or your big toenail cracked horizontally, our expert team is here to help you heal quickly and prevent future issues.
