A black toenail or injured toenail can be painful, alarming, and difficult to ignore. At Idaho Foot & Ankle, we diagnose and treat toenail trauma for patients throughout Twin Falls, the Magic Valley, and surrounding Idaho communities.
Toenail injuries can happen suddenly after dropping something on your foot, stubbing your toe, or participating in sports and running activities. In other cases, repeated pressure from shoes or repetitive activity gradually damages the nail over time. While some black toenails heal on their own, others may involve infection, nail separation, fractures, or underlying conditions that require professional care.
Table of Contents
- What Causes a Black Toenail?
- Common Causes of Toenail Trauma
- Symptoms of Toenail Trauma
- Can a Black Toenail Be Serious?
- Can Toenail Trauma Cause Toenail Fungus?
- How Idaho Foot & Ankle Treats Toenail Trauma
- How Long Does a Black Toenail Last?
- When Should You See a Podiatrist?
- Toenail Trauma Treatment in Twin Falls and the Magic Valley
- Don't Ignore a Painful Black Toenail — Talk to a Twin Falls Foot Specialist
What Causes a Black Toenail?
A black toenail is usually caused by bleeding underneath the nail, known medically as a subungual hematoma. This happens when trauma damages small blood vessels under the nail plate, causing blood to collect beneath the nail.
The nail may appear black, dark red, purple, or brown depending on the severity of the injury and how long ago it occurred.
Common Causes of Toenail Trauma![Twin Falls Toenail Trauma Podiatrist Advanced Foot & Ankle]()
- Dropping heavy objects on the toe
- Stubbing the toe
- Running or hiking long distances
- Tight or poorly fitting shoes
- Sports injuries
- Repeated pressure from athletic activity
- Direct impact during exercise or work
Runners, hikers, and athletes commonly develop black toenails from repeated pressure inside the shoe, especially during downhill movement or high-impact sports.
Symptoms of Toenail Trauma
- Black, purple, or dark discoloration under the nail
- Throbbing pain or pressure
- Swelling around the toenail
- Tenderness when walking or wearing shoes
- The nail lifting or loosening
- Bleeding beneath the nail
- Cracked or partially detached nail
In some cases, the injured nail eventually falls off as a new nail slowly grows underneath.
Can a Black Toenail Be Serious?
Sometimes. While many black toenails are caused by simple trauma, severe injuries may involve fractures, nail bed damage, infection, or long-term nail deformity.
Patients with diabetes, neuropathy, or circulation problems should be especially careful because even minor nail injuries can lead to complications if not properly treated.
If you have diabetes and notice nail discoloration, wounds, swelling, or drainage, you may also want to review our information on diabetic foot wound care and diabetic neuropathy.
Can Toenail Trauma Cause Toenail Fungus?
Yes. Damage to the nail can create openings where fungus may develop later. Some patients initially think they simply have a bruised toenail, only to later develop thickening, discoloration, or fungal infection as the nail grows out.
If your nail becomes thick, brittle, yellow, or distorted after injury, you may also benefit from learning more about toenail fungus treatment.
How Idaho Foot & Ankle Treats Toenail Trauma
Treatment depends on the severity of the injury, pain level, and whether the nail or underlying bone has been damaged. Your treatment plan may include:
- Professional nail evaluation
- Draining pressure beneath the nail when appropriate
- Treatment for nail bed injuries
- Protective bandaging
- Imaging to rule out fractures
- Monitoring for infection
- Toenail removal for severely damaged nails
- Guidance for proper healing and nail regrowth
Prompt treatment can often reduce pain and help prevent complications involving the nail bed or surrounding skin.
How Long Does a Black Toenail Last?
In many cases, the damaged nail slowly grows out over several months. Toenails grow much more slowly than fingernails, which means full recovery may take time depending on the extent of the injury.
If the nail separates or falls off, a new nail may gradually grow in underneath. However, severe nail trauma can sometimes lead to permanent nail thickening or deformity.
When Should You See a Podiatrist?
You should schedule an evaluation if you have severe pain, swelling, drainage, infection, nail separation, difficulty walking, or concern about the appearance of the nail after an injury.
You should also seek care if the discoloration appeared without obvious trauma, as certain nail conditions may require further evaluation.
Toenail Trauma Treatment in Twin Falls and the Magic Valley
At Idaho Foot & Ankle, we help patients throughout Twin Falls and the Magic Valley recover from painful toenail injuries with personalized care focused on relieving pain, protecting the nail bed, and supporting healthy healing.
Don't Ignore a Painful Black Toenail — Talk to a Twin Falls Foot Specialist
A black toenail may seem minor at first, but severe nail trauma can lead to ongoing pain, infection, nail deformity, and difficulty walking comfortably. Board-certified podiatrist Dr. Matt Wettstein helps patients throughout Twin Falls and the Magic Valley diagnose and treat toenail injuries with care focused on protecting the nail and preventing long-term complications.
Whether your toenail injury happened during sports, work, hiking, or everyday activity, Idaho Foot & Ankle offers treatment options designed to relieve pain and support proper healing. Patients experiencing ongoing nail thickening or discoloration after injury may also benefit from learning about toenail fungus treatment and ingrown toenail care.
Call our Twin Falls office at 208.731.6321 or request an appointment online. You can also read patient reviews and get directions on Google.
