Extensor muscle strains and sprains of the thumb at the wrist or hand level are typically caused by overuse or trauma. Overuse can lead to muscle fatigue and eventual tearing of the muscle fibers, while trauma can occur due to a fall, direct blow, or other mechanism that causes sudden and intense muscle contraction.
Diagnosis of a strain or sprain of the extensor muscle, fascia or tendon of the thumb at the wrist or hand level is typically made through a physical examination. The doctor may ask questions about the patient’s medical history and the mechanism of injury, and palpate the area for signs of tenderness, swelling, and deformity. X-rays may also be taken to rule out any fractures.
Other conditions that can present with similar symptoms include carpal tunnel syndrome, tendonitis, and arthritis.
Treatment for a strain or sprain of the extensor muscle, fascia or tendon of the thumb at the wrist or hand level typically includes rest, ice, and over-the-counter pain medications. Physical therapy and/or splinting may also be recommended to help with strengthening and range of motion. In more severe cases, surgery may be necessary to repair the muscle or tendon.
The prognosis for this condition is generally good with appropriate treatment. Most patients will have full recovery with only minimal limitations.