1. Unstable or Displaced Hand Fractures

A fracture occurs when a bone in the finger, thumb, hand, or wrist breaks. Some fractures remain properly aligned and stable. These may heal with a splint, cast, or buddy taping.

Surgery may be considered when the fracture is:

• Significantly displaced
• Rotated
• Angulated
• Unstable
• Broken into several pieces
• Extending into a joint
• Associated with tendon or nerve damage
• Unable to remain aligned in a cast
• Causing visible finger deformity

A rotated fracture may cause one finger to cross over another when the patient closes the hand. Even a small degree of rotation can interfere with grip and coordination.

When discussing which hand injuries need surgery, unstable fractures are among the most common examples. Surgery may use pins, screws, wires, plates, or other fixation devices to maintain alignment while the bone heals.

2. Open Hand Fractures

An open fracture occurs when a broken bone communicates with a skin wound. The bone does not always need to be visibly protruding for the fracture to be considered open.

Open fractures can expose deeper tissues to bacteria and contamination. They may also involve damage to tendons, nerves, blood vessels, muscles, and skin.

Possible treatment includes:

• Urgent wound cleaning
• Removal of contaminated or dead tissue
• Antibiotics
• Tetanus protection
• Fracture stabilisation
• Repair of damaged tendons or nerves
• Soft-tissue coverage

Open fractures are an important answer to which hand injuries need surgery because many require operative cleaning and stabilisation to reduce infection risk and support proper healing.

3. Complete Tendon Injuries

Tendons connect muscles to bones and allow the fingers and wrist to move. Flexor tendons bend the fingers, while extensor tendons help straighten them.

A tendon may be damaged by:

• Glass cuts
• Knife injuries
• Machinery accidents
• Crush injuries
• Sports trauma
• Forced bending or straightening
• Fractures

Signs of a complete tendon injury may include:

• Inability to bend a finger
• Inability to straighten a finger
• A finger resting in an unusual position
• Sudden loss of movement after a cut
• Weak or incomplete movement
• Pain along the tendon

A completely divided tendon generally cannot reconnect correctly without repair. Hand tendon repair surgery brings the damaged ends together so healing can occur.

Therefore, when patients ask which hand injuries need surgery, complete flexor or extensor tendon injuries are a major category.

Partial tendon injuries do not always require surgery, but they still need careful assessment because continued movement may worsen the tear.

4. Severe Nerve Injuries

Nerves provide sensation and control several hand muscles. A nerve can be bruised, stretched, compressed, partly cut, or completely divided.

Symptoms may include:

• Numbness
• Tingling
• Burning pain
• Electric-shock sensations
• Weakness
• Reduced coordination
• Loss of temperature awareness
• Difficulty holding small objects

A mildly bruised nerve may recover without an operation. However, a fully divided nerve often requires surgical exploration and repair because the separated ends may not reconnect properly on their own.

Surgical options may include:

• Direct nerve repair
• Nerve grafting
• Nerve transfer
• Nerve decompression
• Removal of scar tissue around the nerve

Severe nerve injuries are another clear example of which hand injuries need surgery, particularly when sensation or muscle control is completely lost.

Nerve recovery is slow. Even after successful repair, sensation and strength may take months to improve.

5. Blood Vessel Injuries

Blood vessels carry oxygen-rich blood to the hand and fingers. Deep cuts, crushing, fractures, and partial amputations can damage an artery.

Warning signs include:

• A pale finger
• Blue or dark skin
• Unusual coldness
• Severe pain
• Loss of sensation
• Weak or absent circulation
• Bleeding that does not stop

Blood vessel injuries may require urgent microsurgical repair. Delayed restoration of circulation can cause permanent tissue damage.

When identifying which hand injuries need surgery urgently, reduced blood supply is one of the most important warning signs.

A surgeon may repair the damaged vessel directly or use a vein graft to bridge a gap.

6. Complex Crush Injuries

Crush injuries can damage several hand structures at the same time. They may occur when the hand becomes trapped in machinery, a door, a vehicle, or beneath a heavy object.

A severe crush injury may affect:

• Bones
• Tendons
• Nerves
• Blood vessels
• Muscles
• Skin
• Fingernails
• Joints

Some crush injuries require more than one procedure. Initial surgery may focus on cleaning the wound, restoring circulation, stabilising fractures, and removing tissue that cannot survive.

Later procedures may repair tendons, reconstruct nerves, cover exposed structures, or improve movement.

Complex crush injuries are often included when explaining which hand injuries need surgery because non-surgical treatment cannot correct major structural damage.

7. Joint Dislocations and Ligament Tears

A dislocation occurs when the bones forming a joint move out of their normal position. Ligaments that stabilise the joint may also tear.

Many simple finger dislocations can be repositioned without surgery. Surgery may be considered when:

• The joint cannot be repositioned
• The joint remains unstable
• A ligament is completely torn
• A fracture is present
• A tendon is trapped
• Bone or soft tissue blocks reduction
• The joint repeatedly dislocates
• The injury causes major functional limitation

Persistent instability can lead to pain, weakness, abnormal movement, and early joint wear.

Therefore, severe joint and ligament damage may be included in which hand injuries need surgery, especially when splinting cannot maintain stability.

8. Fingertip Injuries and Tissue Loss

Fingertip injuries can affect the nail, skin, bone, sensation, and soft-tissue padding. They may occur due to doors, machines, knives, or workplace accidents.

Minor fingertip wounds may heal with dressings. Surgery may be considered when:

• Bone is exposed
• A large amount of tissue is missing
• The nail bed is seriously damaged
• The wound cannot close naturally
• Sensation is threatened
• A fingertip is partially amputated
• Durable soft-tissue coverage is required

Surgical treatment may include:

• Nail-bed repair
• Bone shortening
• Skin grafting
• Local tissue flaps
• Reconstructive tissue transfer
• Replantation in selected cases

Larger fingertip wounds with exposed structures may need surgery to obtain suitable coverage.

9. Deep or Contaminated Wounds

A deep wound may appear small at the skin level while extending into a tendon, joint, nerve, artery, or bone.

Surgery may be necessary when the wound:

• Contains glass, metal, soil, or grease
• Extends into a joint
• Exposes tendon or bone
• Contains dead tissue
• Has caused infection
• Involves an animal or human bite
• Cannot be cleaned safely without exploration
• Has damaged important deeper structures

Surgical wound cleaning is known as debridement. It involves removing contamination, foreign material, and damaged tissue.

Deep contaminated wounds are an important part of which hand injuries need surgery because closing such wounds without proper cleaning may trap bacteria inside.

10. Partial or Complete Amputations

A partial amputation means part of the finger or hand remains attached. A complete amputation means the separated part is no longer connected.

Treatment depends on:

• The level of injury
• The condition of the separated part
• The amount of crushing
• Time since the accident
• Blood vessel damage
• Patient health
• Expected function
• Availability of microsurgical care

Surgery may involve replantation, revision of the injured area, bone repair, tendon repair, nerve repair, blood vessel repair, or tissue coverage.

These injuries require urgent specialist assessment.

11. Infected Hand Injuries

Hand infections may develop after cuts, puncture wounds, bites, burns, or retained foreign objects.

Symptoms can include:

• Increasing redness
• Swelling
• Warmth
• Pus
• Fever
• Severe tenderness
• Pain during finger movement
• Reduced movement
• Red lines extending from the wound

Some superficial infections respond to antibiotics and wound care. Deep infections may require surgery to drain pus, clean infected tissue, remove foreign material, or protect tendons and joints.

Infections involving tendon coverings, joints, or bone may progress quickly. They may therefore be included when evaluating which hand injuries need surgery.

12. Old Hand Injuries Causing Deformity

Not all operations are performed immediately after an accident. Some patients seek treatment weeks, months, or years later because the injury healed poorly.

Old injuries may cause:

• Crooked fingers
• Rotational deformity
• Joint stiffness
• Tendon adhesions
• Weak grip
• Painful scars
• Persistent numbness
• Unstable joints
• Limited movement

Surgical options may include:

• Corrective bone surgery
• Tendon reconstruction
• Tendon release
• Nerve reconstruction
• Scar release
• Joint reconstruction
• Tissue transfer

The possibility of improvement depends on the condition of the joints, muscles, nerves, tendons, and surrounding tissues.