Ulnar Collateral Ligament is an injury to the ligament that stabilizes the inside of your elbow. Overuse of the elbow causes the ligament to weaken resulting in a sprain. When the injury occurs, the athlete will have pain in the elbow, catching, popping, or shifting in the joint, decreased range of motion in the joint, and loss of control and power when throwing.
If you suspect your child has an Ulnar Collateral Ligament injury, start with RICE (rest, Ice, Compression, and elevation). If symptoms persist or arm function is limited you should call the doctor.