Steroid or painkiller shot: which works better for thumb tendonitis?

This study tested whether a steroid injection (betamethasone) or a nonsteroidal anti-inflammatory injection (ketorolac) better relieves pain from DeQuervain's tenosynovitis, a painful thumb tendon condition. 62 adults with the condition received one of the two injections. Researchers measured pain during a specific thumb movement and at rest to see which treatment worked better.