How can I relieve a muscle sprain in wrist/arm?

PRICEMM. Protect- the injured limb rest- the injured limb ice- 15-20 minutes to get that deep numb, 2-3 times a day. Compression- wrap the injured limb to heal swelling. Elevate-limb to relieve swelling. Mobility- once the limb is not painful, get it moving around.