S90.22 Contusion of lesser toe with damage to nail

Name of the Condition

• Contusion of lesser toe with damage to nail

Summary

A contusion of the lesser toe with damage to the nail is a bruise resulting from blunt force trauma that affects the soft tissues of the toe and the nail structure. This injury typically causes localized pain, swelling, and discoloration, with potential nail bed injury or subungual hematoma (blood under the nail). The condition involves damage to the nail, which may present as discoloration, lifting, or partial/complete nail loss.

Causes

Direct impact or trauma to the lesser toe, such as stubbing it against a hard object, dropping a heavy item on it, or injuries during sports or physical activities. The force applied to the toe can damage both the underlying soft tissues and the nail, leading to the combined injury.

Risk Factors

• Participation in activities with a high risk of toe trauma, such as running, hiking, or contact sports.
• Wearing open-toed or poorly fitting footwear that exposes the toes to injury.
• Occupations involving physical labor or environments where foot injuries are more likely.
• Pre-existing conditions like reduced sensation or circulation in the feet, which may increase susceptibility to injury.

Symptoms

• Pain and tenderness around the affected toe.
• Localized swelling and discoloration (bruising) of the skin.
• Nail damage, including discoloration, lifting, or partial/complete nail loss.
• Possible difficulty walking or applying pressure on the toe.

Diagnosis

Physical examination by a healthcare provider to assess tenderness, swelling, discoloration, and nail integrity. A review of the patient’s history of trauma helps confirm the diagnosis. Imaging is rarely needed unless a fracture or severe tissue damage is suspected.

Treatment Options

• Rest and elevation of the foot to reduce swelling.
• Ice application to the affected area for 15–20 minutes several times a day.
• Pain relief with over-the-counter medications like acetaminophen or ibuprofen.
• Nail care, such as draining a subungual hematoma if needed, or protecting the nail from further injury.
• In severe cases, a healthcare provider may recommend a protective dressing or referral to a specialist.

Prognosis and Follow-Up

Most contusions of the lesser toe with nail damage heal within 1–2 weeks with proper care. Follow-up may be needed if pain persists, swelling worsens, or signs of infection (e.g., redness, pus) develop. Nail regrowth may take several months if the nail bed is injured.

Complications

• Infection, particularly if the nail is partially lifted or the skin is broken.
• Chronic pain or sensitivity if the nail bed is severely damaged.
• Nail deformity or permanent discoloration after healing.
• Delayed healing in individuals with poor circulation or diabetes.

Lifestyle & Prevention

• Wear closed-toed, well-fitting shoes during activities with a risk of toe injury.
• Use protective footwear in work or sports environments.
• Avoid walking barefoot in areas with hard or uneven surfaces.
• Maintain good foot hygiene to reduce infection risk.

When to Seek Professional Help

Seek medical attention if:

• Pain is severe or unrelenting.
• Swelling or discoloration worsens over time.
• Signs of infection (e.g., redness, warmth, pus) appear.
• The toe looks deformed or you suspect a fracture.
• Nail loss is complete or the nail bed is exposed.

Tips for Medical Coders

Document the specific toe (lesser toe) and the presence of nail damage clearly in the medical record. Ensure the diagnosis aligns with the clinical findings of blunt trauma to the toe and nail structure. Code S90.22 is appropriate when the injury involves a lesser toe and nail damage, with no need to specify laterality or additional details unless documented.