With this injury, the main ligament in your thumb is stretched or torn. The ligament is a strong fiber that attaches one bone to another bone.
This injury can be caused by any kind of fall with your thumb stretched out. It often occurs during skiing.
At home, be sure to follow your doctor's instructions on how to take care of your thumb so that it heals well.
More About Your Injury
Thumb sprains can be mild to severe. They are ranked by how much the ligament is pulled or torn away from the bone.
- Grade 1: Ligaments are stretched, but not torn. This is a mild injury. It can improve with some light stretching.
- Grade 2: Ligaments are partially torn. This injury may require wearing a splint or a cast for 5 to 6 weeks.
- Grade 3: Ligaments are completely torn. This is a severe injury that may require surgery.
Injuries that are not treated properly can lead to long-term weakness, pain, or arthritis.
An x-ray may also show if the ligament has pulled off a piece of bone. This is called an avulsion fracture.
What to Expect
Common symptoms are:
- A weaker pinch or problems grabbing things when you use your thumb
If surgery is needed, the ligament is reconnected to the bone.
- Your ligament may need to be reattached to the bone using a bone anchor.
- If your bone is broken, a pin will be used to put it in place.
- After surgery your hand and forearm will be in a cast or splint for 6 to 8 weeks.
Relieving Your Symptoms
Make an ice pack by putting ice in a plastic bag and wrapping a cloth around it.
- Do not put the bag of ice directly on your skin. Cold from the ice can damage your skin.
- Ice your thumb for about 20 minutes every hour while awake for the first 48 hours, then 2 to 3 times a day.
For pain, you can use ibuprofen (Advil, Motrin, and others) or naproxen (Aleve, Naprosyn, and others). You can buy these medicines without a prescription.
- Do not use these medicines for the first 24 hours after your injury. They may increase the risk of bleeding.
- If you have heart disease, high blood pressure, kidney disease, liver disease, or have had stomach ulcers or bleeding, talk with your health care provider before using these medicines.
- Do not take more than the amount recommended on the bottle or more than your provider advises you to take.
As you recover, your provider will check how well your thumb is healing. You will be told when your cast or splint can be removed and you can return to your normal activities.
At some point as you recover, your provider will ask you to begin exercises to regain movement and strength in your thumb. This may be as soon as 3 weeks or as long 8 weeks after your injury.
When you restart an activity after a sprain, build up slowly. If your thumb begins to hurt, stop using it for a while.
When to Call the Doctor
Call your provider or go to the emergency room right away if you have:
- Severe pain
- Weakness in your thumb
- Numb or cold fingers
- Drainage or redness around the pins, if you had surgery to repair the tendon
Also call your provider if you have concerns about how well your thumb is healing.
Sprained thumb; Stable thumb; Ulnar collateral ligament injury; Gamekeeper's thumb
Merrell G, Hastings H. Dislocations and ligament injuries of the digits. In: Wolfe SW, Hotchkiss RN, Pederson WC, Kozin SH, Cohen MS, eds. Green's Operative Hand Surgery. 7th ed. Philadelphia, PA: Elsevier; 2017:chap 8.
Stearns DA, Peak DA. Hand. In: Walls RM, Hockberger RS, Gausche-Hill M, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 9th ed. Philadelphia, PA: Elsevier; 2018:chap 43.
Review Date 10/12/2020
Updated by: Jesse Borke, MD, CPE, FAAEM, FACEP, Attending Physician at Kaiser Permanente, Orange County, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.