In short. What hand surgery treats — congenital differences, trauma, tendon and nerve injury, and post-operative reconstruction — and why the specialty puts function first.
Key points
- Skin, tendon, nerve, bone, and joint are interdependent.
- A stiff finger after tendon repair is usually a therapy problem, not a surgical one.
- A numb fingertip after a nerve repair may take a year to improve, if it improves at all.
Hand surgery is not one operation but a way of thinking about a small, crowded, unforgiving part of the body. In a space no larger than a palm, tendons glide through tunnels, nerves branch into fine digital branches, joints hinge within millimetres of their tolerance, and skin is thin enough that a scar can tether a finger. The specialty exists because general surgical principles do not transfer neatly to that scale.
What the specialty covers
Four broad areas. First, congenital differences — conditions a child is born with, such as joined fingers, extra digits, or an underdeveloped thumb. Second, trauma: cuts, crush injuries, fractures, and amputations, which are the most common reason hand surgery is needed urgently. Third, tendon and nerve problems, including lacerations, entrapment, and the tendon transfers used to restore movement when a nerve cannot be repaired. Fourth, reconstruction after the event — releasing contractures, revising scars, and rebuilding a thumb or a digit that has been lost.
Function first
The organising principle is function before appearance. A hand that looks nearly normal but cannot pinch, grip, or feel is a worse outcome than a hand with a visible scar that works. Surgeons therefore ask about grip, pinch, sensation, and the ability to return to work long before they discuss how a scar will look. Appearance matters and is addressed, but it is rarely the first question.
The hand is a system, not a part
Skin, tendon, nerve, bone, and joint are interdependent. A stiff finger after tendon repair is usually a therapy problem, not a surgical one. A numb fingertip after a nerve repair may take a year to improve, if it improves at all. Treating one structure well while neglecting the others is the commonest way a good operation produces a poor result.
What surgery can and cannot do
It can restore continuity to a divided tendon, protect a repaired nerve with a good bed, realign a fracture, release a tight scar, and reconstruct a missing thumb. It cannot make a repaired nerve conduct as fast as an uninjured one, cannot guarantee that a tendon will not re-rupture if it is used too forcefully too early, and cannot remove the scar that every incision leaves.
Recovery and assessment
Nerve recovery proceeds at roughly a millimetre a day, so a nerve repaired at the wrist may take many months to reach the fingertips. A tendon repair is protected by splinting and graded exercise for six to twelve weeks. Stiffness is the commonest enemy of a good result, and therapy is what holds it back. Final assessment is made at twelve months or longer, and no outcome is guaranteed.
Seek care urgently if
- A hand becomes pale, cold, blue, or numb after an injury or an operation.
- A wound becomes red, hot, or starts discharging, or a fever develops.
- Movement is suddenly lost after tendon repair, or pain and swelling increase inside a cast or splint.
Frequently asked questions
What kinds of problem does hand surgery treat?
Four broad groups: congenital differences such as joined or extra digits, injuries including cuts, crush wounds and amputations, tendon and nerve problems, and reconstruction after an injury, such as releasing a tight scar or rebuilding a thumb.
Why do surgeons put function before appearance?
Because a hand that looks almost normal but cannot pinch, grip or feel is a worse outcome than a scarred hand that works. Grip, pinch and sensation are assessed first, and appearance is addressed but rarely leads the plan.
How quickly do nerves recover after hand surgery?
Nerve fibres regrow at roughly a millimetre a day, so a nerve repaired at the wrist can take many months to reach the fingertips. Recovery is often incomplete, and final assessment is made at twelve months or longer.
Risks & Limitations
- Incomplete return of sensation or movement. Nerve recovery is slow — roughly a millimetre a day — and some feeling or movement may never come back.
- Stiffness and contracture. A stiff hand is the commonest reason a technically good operation gives a disappointing result.
- Rupture of a tendon repair with forceful use too early in the protected period.
- Infection, which may require antibiotics and further surgery.
- Scarring and scar contracture. Scars are permanent, may stay sensitive or cold-intolerant, and can tether a joint or a web space.
- Growth disturbance in children, which may require later surgery as the hand grows.
- Prolonged hand therapy. Splinting and graded exercise are part of the treatment, not optional aftercare.
- No outcome is guaranteed. Final assessment is made at 12 months or longer, and longer still in growing children.
When to Seek Care
- A hand that becomes pale, cold, blue or numb, or fingers that change colour.
- A wound that becomes red, hot or discharging, or a fever above 38 °C.
- Sudden loss of movement after tendon repair, or a pop felt in the finger.
- Severe pain or swelling in a cast or splint, or a splint that has become too tight.
- Bleeding that does not stop with gentle pressure.
- New or worsening numbness or weakness at any stage after surgery.
References & Further Reading
- American Society for Surgery of the Hand (ASSH) — hand and upper limb condition guidance
- American Society of Plastic Surgeons (ASPS) — reconstructive and hand surgery guidance
- Cochrane Library — systematic reviews in hand surgery and hand therapy
- Chinese Medical Association, Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.