I fell down the stairs and fell on my knee,i am experiencing pain when i bend or move my knee.took analgesics last night pain still persists?what can i do?

Knee injury: Contusion of the knee would be treated with rest, elevation of the leg and applying ice wrapped in a towel for 20 minutes four times a day for 48 hours. Worrisome signs would be increasing pain and appearance of swelling rather than gradual improvement. This would require a prompt evaluation by a physician or orthopedic specialist. Anti-inflammatory medications may promote or aggravate bleeding.