I was just wondering how can i reduce sprained finger pain?

Heat and: Immobilization in extension with occasional stretching. Alternating heat and cold can help also.

Finger sprain: Swelling from a sprain, bruise or tiny fracture may make the joint stiff and as a result hard to make a full fist or painful making the hand feel weak. Typically it is better to transiently splint the pip and dip figer joints straight when inactive, ice and at the same time work on motion when swelling is down. Nsaids can help as well. Often swelling persists in the small joints for a few months.