Because fungal nail infections and nail injuries can look similar, an accurate diagnosis is important before treatment begins.

Bay Podiatry Associates in Brooklyn, NY evaluates discolored, thickened, painful, and abnormal toenails to help determine the underlying cause.

What Is Toenail Fungus?

Toenail fungus, also called onychomycosis, is an infection caused by fungal organisms that invade the nail.

The infection may begin at the edge or underneath the nail and gradually spread.

Over time, the nail can become thickened, discolored, brittle, or crumbly.

What Does Toenail Fungus Look Like?

Common signs include:

• Yellow or white discoloration
• Thickening
• Crumbling edges
• Brittleness
• Distorted nail shape
• Debris beneath the nail
• Separation from the nail bed

Not every patient develops all of these signs.

What Does a Nail Injury Look Like?

Trauma may cause:

• Dark purple or black discoloration
• Bruising beneath the nail
• Nail lifting
• Cracks or splits
• Pain
• Swelling
• Nail loss
• Irregular regrowth

Repeated pressure from shoes can also create chronic nail changes even without a memorable injury.

Can Running or Tight Shoes Damage Toenails?

Yes.

Runners, hikers, and people who wear shoes with inadequate toe room may repeatedly strike the nail against the shoe.

This can lead to bruising, thickening, loosening, or permanent changes in nail growth.

Can a Nail Injury Cause Fungus Later?

Yes.

Damage to the nail can make it easier for fungal organisms to enter.

This means trauma and fungal infection may sometimes occur together.

Why Is It Important to Know the Difference?

Treatment for a fungal infection is different from treatment for nail trauma.

Using antifungal products on a nail that is damaged but not infected may be ineffective.

Likewise, assuming a fungal nail is only bruised may delay appropriate treatment.

How Is Toenail Fungus Diagnosed?

A podiatrist may examine the nail and, in some cases, obtain a sample for laboratory testing.

This can help distinguish fungal infection from other nail disorders.

Can Toenail Fungus Spread?

Yes.

Fungal infections can affect additional toenails and may also be associated with athlete’s foot.

Shared damp environments, communal showers, and contaminated footwear may contribute to exposure.

Is Toenail Fungus More Concerning for People With Diabetes?

It can be.

Thick or brittle nails may create pressure, skin injury, or difficulty with nail care.

Patients with diabetes, neuropathy, or circulation problems should be cautious about trimming abnormal nails and should seek professional guidance when appropriate.

Can a Bruised Toenail Fall Off?

Yes.

A significantly injured nail may loosen and detach as a new nail grows underneath.

Toenails grow slowly, so replacement can take many months.

How Are Abnormal Toenails Treated?

Treatment depends on the diagnosis.

Options may include:

• Antifungal medication
• Nail debridement
• Footwear changes
• Monitoring injured nails
• Treating athlete’s foot
• Addressing repeated shoe pressure

Treatment is most effective when based on the actual cause.

When Should You See a Podiatrist?

Schedule an evaluation if a toenail is persistently thick, painful, discolored, draining, distorted, or difficult to trim.

Patients with diabetes or reduced circulation should seek care promptly for nail-related skin injuries.

Frequently Asked Questions About Toenail Fungus and Nail Injuries

How can I tell if my toenail is fungal or bruised?

Fungus often causes gradual yellowing, thickening, and crumbling, while trauma may cause sudden dark discoloration or pain. However, appearance alone is not always enough.

Can toenail fungus turn a nail black?

Fungal nails can become discolored, but dark or black coloring may also result from bleeding, trauma, or other causes.

Does toenail fungus hurt?

It can, especially when the nail becomes thick and presses against shoes.

Can trauma make a toenail thick?

Yes. Repeated injury can cause thickened or distorted nail growth.

How long does a damaged toenail take to grow out?

Toenails grow slowly and may take many months to fully replace.

Will toenail fungus go away on its own?

It often persists without treatment and may spread or worsen.

Can I use over-the-counter antifungal products?

Some mild fungal infections may respond to topical products, but nail fungus can be difficult to treat. Diagnosis is important before prolonged treatment.

Why does my toenail keep lifting?

Trauma, fungal infection, pressure, and other nail disorders can cause separation from the nail bed.

When should nail discoloration be evaluated?

Persistent, unexplained, painful, or changing discoloration should be professionally evaluated.

Contact Information

If your toenails are thick, discolored, brittle, painful, or changing in appearance, Bay Podiatry Associates can help determine whether fungus, trauma, or another condition may be responsible.

Bay Podiatry Associates
8635 21 St Ave Suite 1C
Brooklyn, NY 11214
Phone: (718) 266-1986
Website: baypodiatrybrooklyn.com

Book Online: baypodiatrybrooklyn.com/appointments/