Ulnar Collateral Ligament Sprain of Thumb
(Skier’s Thumb; Gamekeeper’s Thumb)
How to Say It: Ull-narr Co-lat-err-ull Ligg-uh-ment Sprain of Thumb
by Cynthia M. Johnson, MA
An ulnar collateral ligament (UCL) sprain is an injury to the ligament of the first thumb joint. A ligament is a band of tissue that connects bone to bone. A sprain is tearing of a ligament.
This sprain is caused by trauma to the ligament. This can happen from a fall or sports injury. It can also be from repeated stress on the UCL.
Things that raise the risk of this problem are:
You may have:
You will be asked about your symptoms, health history, and how the injury happened. A physical exam will be done. It will focus on the thumb. This is often enough to make the diagnosis.
Images may be done to find out how much harm was done. This can be done with:
Treatment will depend on how severe the injury is. The goal is to ease pain and improve movement. Options are:
Surgery may be needed for a severe sprain or complete tear.
Most strains are due to accidents. They cannot always be prevented. The risk may be lowered by using the correct techniques when playing sports.
Family Doctor—American Academy of Family Physicians
Ortho Info—American Academy of Orthopaedic Surgeons
Canadian Orthopaedic Foundation
Skier’s thumb. British Society for Surgery of the Hand website. Available at:
...(Click grey area to select URL)
Accessed August 2, 2021.
Sprained thumb. Ortho Info—American Academy of Orthopaedic Surgeons website. Available at: https://orthoinfo.aaos.org/en/diseases--conditions/sprained-thumb. Accessed August 2, 2021.
Ulnar collateral ligament injury of the thumb. American Society of Hand Therapists website. Available at: https://www.asht.org/sites/default/files/docs/2016/UCL%20Injury%20of%20the%20Thumb%202016.pdf. Accessed August 2, 2021.
Ulnar collateral ligament sprain of thumb. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/ulnar-collateral-ligament-sprain-of-thumb. Accessed August 2, 2021.
Last reviewed July 2021 by EBSCO Medical Review Board Warren A. Bodine, DO, CAQSM
Last Updated: 8/2/2021
EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
To send comments or feedback to our Editorial Team regarding the content please email us at email@example.com. Our Health Library Support team will respond to your email request within 2 business days.