How could i cure a sprained ligament in my arm(elbow)?

Rest, NSAID, therapy: Depending of the severity of your injury, it may take some time to heal. Should give it some rest. Gentle range of motion exercise, and use of antiinfkammatory med such as motrin/aleve may help. You may need physical therapy if severe. If above measures not helpful, consult doc for eval. Good luck.

Elbow sprain: Typically sprains heal over 6-8 weeks, however severe sprains or complete tears sometimes require reconstructive surgery. Initial rest and ice with anti inflammatories help. If your elbow moves but is very painful, or if you cannot move it at all, i would see your orthopedist to rule out a fracture.