A locked thumb is often a symptom of trigger thumb, a condition where a tendon in the thumb becomes inflamed and swollen. This inflammation causes the thumb to lock or catch in a bent position, making it difficult to straighten.
Understanding Trigger Thumb
Trigger thumb happens when the tendon sheath (the protective covering around the tendon) becomes irritated. This irritation, often caused by repetitive movements, overuse, or injury, leads to swelling and thickening. The thickened tendon then struggles to move smoothly through the sheath, causing the characteristic locking or catching sensation. Several sources confirm this: Mayo Clinic states that "long-term irritation of the tendon sheath can lead to scarring," https://www.webmd.com/rheumatoid-arthritis/trigger-finger and the American Academy of Orthopaedic Surgeons notes that "the pulleys that help bend your fingers become too thick, leading to a popping or catching feeling as well as pain." https://www.assh.org/handcare/condition/trigger-finger
Treatment Options for a Locked Thumb (Trigger Thumb)
Treatment options vary depending on the severity of the condition:
1. Nonsurgical Treatment:
- Rest: Avoiding activities that aggravate the thumb is crucial. The AAOS recommends resting your hand and avoiding activities that worsen the condition. https://www.orthoinfo.org/en/diseases--conditions/trigger-finger/
- Splinting: Immobilizing the thumb with a splint can help reduce inflammation and pain.
- Corticosteroid Injections: A steroid injection into the base of the thumb can reduce swelling and inflammation. The NHS recommends this as a treatment option. https://www.nhs.uk/conditions/trigger-finger/treatment/
- Therapy: Occupational therapy can teach you exercises to improve thumb mobility and strength. Mayo Clinic suggests this as a treatment option. https://www.mayoclinic.org/diseases-conditions/trigger-finger/diagnosis-treatment/drc-20365148
2. Surgical Treatment:
If nonsurgical treatments fail, surgery may be necessary to release the tight tendon sheath.
Immediate Actions:
- Gentle Pressure: If you can gently manipulate your thumb back into place, you can try this, but only if you can do it without pain. (Source: November 18, 2022 article mentioning using gentle pressure).
It's crucial to consult a doctor or hand specialist for proper diagnosis and treatment. Self-treating may delay appropriate care and worsen the condition.
