About gamekeeper's thumb
The ulnar collateral ligament (UCL) sits on the inside of the thumb's main knuckle and keeps the thumb steady when you pinch or grip. When the thumb is forced away from the hand, as in a fall while holding a ski pole, the ligament can be sprained or torn. A long-term version, from repeated strain, was first described in gamekeepers.
Many injuries are partial sprains that heal well with protection. A complete tear is different, especially when the torn end flips out of position and cannot reach its attachment. That type of tear usually needs surgery, so getting an accurate diagnosis early matters.
Common symptoms
- Pain and swelling on the inside of the thumb's main knuckle
- A weak or painful pinch, such as when turning a key
- A thumb that feels loose or wobbly
- Bruising after a fall or twisting injury
- A firm lump near the knuckle in some complete tears
Common causes and risk factors
- Falling on an outstretched hand while holding a ski pole
- Ball sports where the thumb is jammed backward
- Repeated stress on the thumb over time
- A previous thumb sprain that did not fully heal
How we diagnose it
Dr. Gruner examines the thumb and gently tests the ligament's stability, comparing it to the other side. Ultrasound at the exam table shows whether the ligament is sprained, partly torn, or fully torn, and whether a torn end has moved out of place. X-rays check for a small fracture where the ligament attaches to bone.
How Propel treats gamekeeper's thumb
Most sprains and partial tears heal with a thumb splint or cast for several weeks, followed by a gradual program to restore motion, pinch strength, and confidence. Many athletes can keep training with a protective splint or taping while they recover. In select partial injuries that stay painful despite good care, Dr. Gruner may discuss PRP, though evidence for ligaments is more limited than for tendons.
A complete tear, particularly one where the ligament end has flipped out of position, usually needs surgical repair to restore a stable pinch. When ultrasound shows that type of tear, we explain the findings clearly and help coordinate a prompt referral to a hand surgeon, since timing can affect the result.
What to expect at your visit
- 1.
We listen first
Your visit opens with a real conversation: how the problem started, what you have already tried, and the activity you want back.
- 2.
Exam and in-office ultrasound
A hands-on exam, then ultrasound at the exam table, often while you move, so your physician can see the tendon, joint, or nerve involved.
- 3.
A clear diagnosis and plan
You leave knowing what is wrong and what your options are, from strength-based rehab to procedures, and why we recommend each one.
- 4.
Treatment and follow-through
Most procedures happen here in the office. We coordinate with your physical therapist and check progress against the goals you set.
Questions about gamekeeper's thumb
- What is a Stener lesion?
- A Stener lesion happens when the torn end of the thumb ligament flips over a nearby tendon and cannot return to where it attaches. It will not heal properly in a splint, so surgery is usually recommended. Ultrasound can often show this in the office.
- Can I keep playing sports with a thumb ligament sprain?
- Often yes, with the right protection and depending on the sport. A splint or taping can guard the thumb while it heals. We help you decide what is safe based on how stable the ligament is.
- What happens if a torn thumb ligament is not treated?
- An unstable thumb can lead to a weak pinch, ongoing pain, and wear on the joint over time. That is why it is worth having a significant thumb injury checked early.