What are the best treatments for a jammed/sprained finger?

Motrin, cold packs: Treatment for a jammed finger includes: rest, cold packs, & elevating that hand up to the chest. Motrin or Advil (ibuprofen) for 3 days helps reduce the swelling & pain. One can "buddy splint" by taping the injured finger to the finger next to it for a few days. If the pain is severe, the finger crooked, or the range of motion significantly decreased, a primary or orthopedic doctor can evaluate & do an x-ray.

Rest and ice: Rest the finger, splint it by taping to the next finger losely & using ice & elevation of finger above the heart level. If not allergic, use ibuprofen. If prolonged pain & swelling or limitation of function, see your pcp. An x-ray may be needed. Small chip fractures may occur. This generally resolves with time. See dr. Robert kwok's answer and my re-tap!