Your doctor will likely recommend that you wear a splint 24 hours a day for four to six weeks to hold the affected area firm and still. You'll also need to stop doing anything that worsens the condition.
You can ice the area to reduce inflammation. If symptoms continue, your doctor may give you anti-inflammatory medication such as naproxen or ibuprofen, or your doctor may inject the area with steroids to curb pain and swelling.