Toenail Injuries: What to Do and When to See a Doctor

Toenail injuries occur in all age groups, ranging from being hit on a threshold and falling heavy objects to sports injuries and being squeezed by tight shoes. The big toe is most often injured due to the stress of walking and running. Taking proper steps in the first few hours reduces pain, speeds recovery, and reduces the risk of future nail deformities. [1]

A subungual hematoma is the most common consequence of an acute contusion. Blood accumulates under the nail plate, creating pressure and severe throbbing pain. In most cases, the problem is resolved by a doctor simply puncturing the plate to drain the blood, while nail removal is rarely necessary and is indicated. Timing, integrity of the marginal ridges, and the absence of displacement of the distal phalanx fracture are important. [2]

Deep nail bed lacerations and plate detachments occur with more severe trauma. In such situations, a fracture assessment is required, often with an X-ray and, if necessary, restoration of the nail bed with absorbable suture or tissue adhesive. Incorrect treatment increases the risk of permanent nail deformity. [3]

A separate group are puncture injuries to the nail area. Punctures through shoes increase the risk of specific infection and osteomyelitis. It is important to promptly assess the depth, the presence of a foreign body, and the tetanus vaccination status. [4]

Table 1. Map of typical toenail injuries

Type of injury	What's happening	Common signs	First steps
Subungual hematoma	Blood under the plate	Throbbing pain, darkening	Cold, elevation, then trepanation by a doctor if pain occurs
Nail bed rupture	Rupture of soft tissues under the plate	Bleeding, splitting of the nail	Fracture assessment, debridement, suturing of the fracture bed
Plate detachment	Partial or complete detachment	Exposure of the bed, pain	Anesthesia, cleansing, and, if necessary, fixation of the plate as a splint
Fracture of the distal phalanx	Crack or comminuted fracture	Pain with axial loading	X-ray, immobilization, nail care
Summarized from specialized manuals. [5]

A brief overview of anatomy and why injuries are insidious

The nail plate rests on the nail bed and emerges from the matrix hidden at the base beneath the posterior fold. Any rupture to the bed or damage to the matrix can impact future nail growth. Therefore, in cases of significant injury or rupture, it is important to consider visualization and, if necessary, restoration of the bed. [6]

The pain associated with a subungual hematoma is caused by blood pressure between the nail plate and the numerous nerve endings in the nail bed. This is why puncturing the nail plate quickly alleviates symptoms, especially in the first 24-48 hours. The longer you wait, the greater the risk that the blood will clot and the drainage will become ineffective. [7]

Nail growth is slow. Toenails grow noticeably slower than fingernails. After nail loss, full regrowth usually takes 12-18 months, which is important to consider when planning your activities and expectations. [8]

Even minor mistakes in the initial steps can delay recovery. For example, aggressive self-drainage with heated objects increases the risk of infection, and attempts to "pull out" the damaged plate without medical advice increase trauma to the implant bed and future deformities. [9]

Symptoms and red flags

Typical symptoms include pain, progressive darkening of the nail plate, swelling of the nail folds, bleeding from under the free edge, and tenderness when pressing on the tip of the toe. Increasing pain in shoes and the inability to step on the toe are common complaints with big toe injuries. [10]

See a doctor immediately if there are signs of an open wound under the plate, severe deformity, inability to take several steps due to pain, numbness at the tip, signs of infection, or if a foreign body is suspected. Patients with diabetes and immunodeficiency require a low threshold for in-person evaluation. [11]

If the injury occurs as a puncture through a shoe, especially a rubber sole, the risk of specific bacterial infection and osteomyelitis increases. Pain with weight-bearing, swelling, and increased tenderness days after the injury are indications for re-evaluation. [12]

Lack of improvement within 48-72 hours, increased pain, and progressive discoloration of the nail also require a reconsideration of the treatment plan. If severe pain persists, trepanation under specialist supervision is often helpful. [13]

Table 2. Red flags and actions

Sign	Possible problem	What to do
Open wound under the plate, deformation	Bed rupture, fracture	In-person care, x-ray, sanitation
Pain and swelling after a puncture wound through a shoe	Risk of specific infection, osteomyelitis	Early assessment, search for foreign body
Increasing pain and redness	Infection	Examination, treatment decision, dressings
Numbness of the tip	Neurological involvement	Urgent in-person assessment
Summary of clinical sources. [14]

First aid in the first 72 hours

Immediately after an injury, cooling with a cloth for 10-15 minutes several times a day, elevation of the foot, gentle compression, and protection from repeated strain are helpful. These simple steps reduce pain and swelling and do not interfere with healing. Rough manipulation of the nail or warming it up on your own are not recommended during the first 24 hours. [15]

A painful subungual hematoma is an indication for trepanation by a specialist. The procedure is effective when performed within 24-48 hours. For small and painless hematomas, intervention is not required – the blood will gradually dissipate as the nail plate grows. [16]

If you suspect a nail bed rupture, plate separation, nail split, or open fracture, do not attempt to "remove" the nail at home. These cases require anesthesia, wound cleansing, tissue repair, and sometimes splinting the nail plate to protect the newly forming nail. [17]

If the injury is punctured, especially through a shoe, it is important to clean the wound, assess the need for visualization for a foreign body, and discuss tetanus prophylaxis. Early treatment reduces the risk of severe infectious complications. [18]

Table 3. First aid: dos and don'ts

Step	Can	It is forbidden
Cooling	Short sessions through fabric	Apply ice to the skin for a long time
Compression	Moderately elastic bandage	Tighten until numb
Wound treatment	Wash and cover with a sterile bandage.	Pulling out the plate yourself
Pain relief	Pain reliever if necessary	Self-drainage with heated objects
Summarized from clinical guidelines. [19]

Diagnostics in the clinic

The examination includes an assessment of the integrity of the marginal ridges, the position and stability of the nail plate, signs of rupture of the nail bed, and the size of the subungual hematoma. Sensitivity of the tip and pain with axial loading of the distal phalanx are checked, which helps suspect a fracture. [20]

A toe x-ray is indicated if a fracture is suspected, if there is a significant hematoma with plate deformation, if there is a severe puncture injury, or if there is an inability to bear weight due to pain. If a foreign body made of a material "invisible" on x-ray is suspected, ultrasound is considered. [21]

When the hematoma is painful and the nail folds are intact, trepanation of the nail plate without removal is preferred. In cases of plate detachment, obvious nail bed rupture, or nail splitting, plate removal, revision, and nail bed restoration are indicated. Decisions are made by a specialist based on the mechanism of injury and imaging data. [22]

After the procedures, the results are recorded in a chart: block type, plate condition, extent of intervention, presence of a fracture, pain management, recommendations for dressings and follow-up visits. This reduces the risk of missing details and simplifies monitoring. [23]

Table 4. When visualization and consultation are needed

Situation	Method	Target
Suspected fracture	X-ray of the foot, toe	Rule out a distal phalanx fracture
Puncture trauma, possible foreign material	X-ray, then ultrasound if necessary	Search and removal of foreign bodies
Rupture of the bed, plate separation	Examination by a specialist	The decision to restore the bed and fix it
No improvement after 72 hours	Re-evaluation	Correction of the treatment plan
According to profile recommendations. [24]

Treatment by injury type

Subungual hematoma. In cases of severe pain and intact marginal ridges, the primary procedure is trepanation of the nail plate with a thin instrument or a disposable electrocoagulator. If an artificial acrylic coating is present, electrocoagulation is dangerous due to the risk of fire; in such cases, a needle is used and the coating is first removed. A late hematoma with a "clot" is less easily drained, and observation may be an option. [25]

Nail bed rupture. If the integrity of the nail bed is compromised and the nail plate is unstable, it is carefully removed, the wound is cleaned, and sutured with absorbable suture or tissue adhesive. Often, the nail plate or its fragment is replaced as a "splint" under the nail fold to preserve the growth channel. Evidence suggests that both sutures and adhesives are effective with comparable outcomes. [26]

Nail plate tear or split. In the case of a partial tear, the plate can be fixed as a biological splint; in the case of a complete tear, a sterile bandage, finger protection, pain control, and monitoring of regrowth are recommended. Restoring the nail bed after a tear is important to prevent longitudinal grooves and split nails. [27]

Distal phalanx fractures. When associated with nail trauma, immobilization of the tip and wound care are often sufficient. Routine antibacterial prophylaxis is not required for clean, undisplaced injuries; the solution is individualized for contaminated wounds and in immunocompromised patients. [28]

Table 5. Subungual hematoma: choice of tactics

Situation	Tactics	Comment
The pain is severe, the ridges are intact	Trepanation	Effective in the first 24-48 hours
The hematoma is small, there is no pain.	Observation	Gradual resorption
The plate is displaced, the bed is torn	Plate removal, revision	Restoration of the bed, fixation
Acrylic coating	Avoid coagulation	Risk of fire, use a needle
Summarized from clinical sources. [29]

Prevention of infection and protection against tetanus

The primary measure for preventing infection is thorough cleaning and covering the wound with a sterile dressing, rather than antibiotics "just in case." Prophylactic antibiotic therapy is considered in cases of significant contamination, in immunocompromised patients, and in cases of bites. Most minor nail injuries do not require antibiotics. [30]

Tetanus prevention depends on the wound type and vaccination history. Antibiotics do not protect against tetanus. For wounds at risk of contamination, the most recent vaccinations should be reviewed and, if necessary, a booster shot or immunoglobulin should be administered as indicated. [31]

Puncture wounds through shoes require particularly careful evaluation. Routine administration of powerful antibacterial agents to everyone is not justified, but if signs of infection or deep lesions are present, the approach should be reconsidered. Examination, search for foreign bodies, and dynamic observation are essential. [32]

Signs of infection include increasing pain, redness, warm skin, purulent drainage, streaks of redness down the foot, and fever. Immediate medical attention is indicated if these occur. [33]

Table 6. Antibiotics and vaccinations: when needed

Situation	Antibiotics	Tetanus vaccination
Clean, uncomplicated nail injury	Not required	According to the calendar if necessary
Significant pollution, immunodeficiency	Consider	According to the scheme for contaminated wounds
Puncture wound through shoe	According to the clinic and risks	Check the status, revaccinate if necessary
Signs of infection	Treatment according to indications	According to the readings
Summarized from recommendations. [34]

Recovery time, new nail growth and prognosis

Pain after trepanation usually subsides immediately, and work comfort returns within a few days. On average, soft tissues heal within 2-3 weeks with careful care and protection of the toe. During this period, dry dressings, dressing changes according to instructions, and footwear monitoring are important. [35]

Full regrowth of a toenail takes an average of 12-18 months. After the nail plate is torn off or the nail bed is restored, the appearance of the new nail plate may differ from the previous one. The presence of longitudinal grooves and uneven shine is often associated with previous trauma to the nail matrix. [36]

If the matrix is significantly damaged, permanent deformities may occur, including split nails, thickening, or waviness. Early, high-quality wound care and careful restoration of the nail bed reduce the risk of such outcomes. [37]

For chronic problems following injury, including ingrown nails, retronychia, and recurrent inflammation, a consultation with a dermatologist or podiatrist is advisable. Timely minor treatments and adjustments to trimming technique often resolve the problem without major interventions. [38]

Table 7. Deadlines and expectations

Stage	Normal terms	What is important
Reducing pain after trepanation	Hours and days	Dry bandage, finger protection
Soft tissue healing	2-3 weeks	Dressings and hygiene
Toenail regrowth	12-18 months	Patience and shoe care
Return to sport	Individually	No pain in shoes or during exercise
Summarized from clinical sources. [39]

Prevention of nail injuries

Choose shoes with sufficient toe box height and a rigid toe box for activities that involve impact. Tight shoes increase pressure on the toe and can lead to subungual hemorrhages and ingrown toes. For running and playing, proper sizing and lacing are beneficial. [40]

Trim your nails straight across, without rounding the corners, to reduce the risk of ingrown nails after an injury. Avoid cutting the corners too deep. Change your socks regularly and keep your feet dry to reduce maceration of the nail folds and inflammation. [41]

When engaging in activities that involve the risk of falling objects, wear safety shoes. At home, avoid picking up heavy objects with bare feet. Simple household measures can significantly reduce injuries. [42]

Artificial nail coatings increase the risk of problems in the event of injury and complicate procedures. If medical procedures are necessary, it is best to remove the coating beforehand to facilitate access and reduce risks. [43]

Table 8. Brief prevention checklist

Risk	What to do	Comment
Tight shoes	Find the right sock size and height	Especially for the thumb
Ingrown edge after injury	Straight cutting line	Don't cut corners too deep
Hitting with objects	Safety shoes	Work and repairs
Artificial turf	Remove before procedures	Simplifies treatment
Summarized from sources. [44]

Frequently asked questions

When to drain a subungual hematoma
: The best time to drain a subungual hematoma is within the first 24-48 hours if the hematoma is severely painful and the marginal ridges are intact. Small, painless hematomas require no intervention. Later, the blood often clots, making drainage difficult. [45]

Are antibiotics necessary "just in case"?
No, routine prophylaxis is not recommended for clean, uncomplicated nail injuries. Exceptions include significant contamination, immunodeficiency, and bites. Wound irrigation and dressing control are important. [46]

What about the tetanus vaccine?
Antibiotics do not prevent tetanus. Vaccination status is checked, and if necessary, a booster shot is administered or immunoglobulin is administered as indicated for contaminated wounds. [47]

Is it possible to burn a hole through an acrylic coating
? No, electrocoagulation through acrylic poses a fire hazard. In such cases, a needle is used and the coating is first removed. [48]