A sprained thumb occurs when a ligament is overextended or torn while severely stressing a joint. Common causes include skiing injury or overextension when playing racket sports, such as tennis.

Thumb weakness, swelling, bruising, and pain are symptoms.

Treatment includes immobilizing the joint with a splint or cast and icing to reduce swelling. Rarely, surgery may be needed if the ligament is completely torn.

An injury of the tissue (ligament) connecting the bones at the base of the thumb.

Consult a doctor for medical advice

Sources:  Mayo Clinic and others.

< 0
Cases per year

More than 200,000 US cases per year

Usually self-treatable

Usually self-diagnosable

Lab tests or imaging rarely required

Short-term: resolves within days to weeks

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