A toenail that is lifting, loose, or has already fallen off (onycholysis or avulsion) is alarming — but in most cases, it is a manageable condition. Whether it happened from an injury, fungal infection, or medical condition, here’s what you need to know.

Why Do Toenails Fall Off?

1. Trauma (Subungual Hematoma)

The most common cause. A direct blow (dropping something on the toe), repetitive microtrauma (runners’ “black toenail”), or wearing shoes that are too short causes blood to pool under the nail (subungual hematoma). The pressure and blood pooling separates the nail from the nail bed, and the nail eventually falls off as it grows out. New nail growth typically begins within 2–3 months.

2. Toenail Fungus (Onychomycosis)

Advanced toenail fungal infection causes the nail to become thickened, brittle, discolored, and separated from the nail bed. Eventually, the compromised nail detaches. Without treatment of the underlying fungal infection, the new nail will be infected as well.

3. Psoriasis

Nail psoriasis affects up to 50% of people with psoriatic skin disease and can cause nail pitting, onycholysis (nail lifting from the bed), and nail loss. It can closely mimic toenail fungus, which is why a podiatrist’s clinical assessment (and sometimes nail biopsy) is important for accurate diagnosis.

4. Ingrown Toenail Complications

Severely infected ingrown toenails can cause nail avulsion (the nail lifting and separating) as the surrounding tissue swells and the nail border becomes embedded.

5. Medical Conditions

Thyroid disorders, severe illness, chemotherapy, and some medications can cause all nails to temporarily stop growing — leading to ridging and eventual shedding (Beau’s lines and onychomadesis). This is typically temporary and resolves as the underlying condition is treated.

What to Do When a Toenail Falls Off

1. Clean the nail bed gently — clean with mild soap and water; do not scrub
2. Apply antibiotic ointment — a thin layer of bacitracin or Neosporin prevents infection
3. Cover with a non-stick bandage — protects the tender nail bed from pressure and contamination
4. Wear comfortable shoes — avoid tight footwear that puts pressure on the exposed nail bed
5. Do not remove a partially detached nail — let it detach naturally; premature removal can cause pain and introduce infection

When to See a Podiatrist

• Signs of infection: increasing redness, warmth, pus, red streaking up the toe or foot
• Significant pain with normal footwear
• Recurring nail loss without clear traumatic cause (may indicate fungal or medical cause)
• Diabetic patients — any toenail loss requires prompt professional evaluation
• New nail growing in abnormally thick, curved, or discolored (may have underlying infection)

How Long Does a New Toenail Take to Grow Back?

Toenails grow approximately 1–2mm per month. A complete regrowth cycle for the big toenail takes 12–18 months. Smaller toes regrow faster. New nail growth is visible within 6–8 weeks of a healthy nail bed.