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A trigger thumb is a thumb stuck in a bent position. It can also happen to a finger. It happens when the tendon that bends and straightens the thumb or finger can't slide smoothly under the ligaments that hold the tendon against the bones. In most cases, this is caused by a bump (nodule) that forms on the tendon. The cause of the bump isn't known. Some cases may be caused by problems with how the muscle develops.
Your child's bent thumb or finger may straighten out on its own.
A trigger thumb or finger can be painful. But it normally isn't a serious problem.
Your child may need surgery if the thumb or finger keeps locking in a bent position.
Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if your child is having problems. It's also a good idea to know your child's test results and keep a list of the medicines your child takes.
Watch closely for changes in your child's health, and be sure to contact your doctor or nurse advice line if:
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Adaptation Date: 5/17/2023
Adapted By: Alberta Health Services
Adaptation Reviewed By: Alberta Health Services
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