Paediatric trigger thumb: When to treat and when to wait
Trigger thumb is a condition that affects young children and it results in their thumb getting stuck in a bent position. While it’s often harmless and can resolve on its own, in some cases, it’s a good idea to medically intervene.
In this article, consultant paediatric orthopaedic surgeon Mr Gregory Firth explores what causes paediatric trigger thumb, when a wait-and-see approach is appropriate and when treatment may be necessary.
What is paediatric trigger thumb?
Paediatric trigger thumb occurs when the flexor tendon in your child’s thumb thickens and develops a nodule. The surrounding sheath tightens, preventing smooth movement when it comes to flexing and extending their thumb.
This can lead to a locked or clicking thumb, and it often becomes noticeable when your child reaches between one and three years old. Unlike trigger finger in adults, which is linked to inflammation or repetitive strain, paediatric trigger thumb is usually not caused by an injury and is instead considered a congenital or developmental condition.
What are the signs and symptoms?
Parents may notice:
- Your child’s thumb is stuck in a bent position
- A small bump (nodule) at the base of the thumb
- Clicking or difficulty straightening their thumb
Luckily, in most cases, your child won’t be in any pain or discomfort.
When to wait for a natural resolution
Many cases of paediatric trigger thumb resolve without treatment. Studies suggest that up to 30% of cases improve on their own by the time a child reaches four or five years old.
A wait-and-see approach may be recommended if:
- Your child’s thumb is still flexible.
- Your child isn’t in any pain
- The condition is mild and doesn’t interfere with daily activities.
If that’s the case for your child, your doctor may recommend gentle stretching exercises and ongoing monitoring.
When to treat, using non-surgical and surgical options
If your child’s thumb remains locked or does not improve by age three to four, it may be that they need treatment. If that’s the case for your child, a range of non-surgical and surgical treatment options are available that may help.
- Non-surgical treatments
In some cases, splinting or physiotherapy may help. However, these methods have limited success in children older than two, as the thickened tendon sheath does not easily resolve without intervention.
- Surgical treatment
If non-surgical treatments don’t help or aren’t appropriate, then your specialist consultant may recommend surgery. This is generally only considered if:- Your child’s thumb is permanently stuck
- They have difficulty using their hand
- The condition persists beyond the age of about four
The procedure, called trigger thumb release, is a minor operation performed under general anaesthesia. A small incision is made at the base of your child’s thumb to release the tendon from the tight sheath.
It’s a quick and safe procedure with a high success rate, and most children recover fully within a few weeks.
What to expect after surgery
After the procedure, your child will probably need to wear a small dressing for a few days. Full movement usually returns within two to four weeks. Complications are rare, but these may include scarring, stiffness or recurrence, which physiotherapy can help address.
Paediatric trigger thumb is a common and generally harmless condition. While some cases resolve naturally, others may require treatment. Talking to a specialist is the best way to get the expert advice and support that your child may need.