Cubital Tunnel Syndrome is a condition caused by compression or irritation of the ulnar nerve as it passes through the cubital tunnel on the inner side of the elbow. The ulnar nerve controls sensation in the little finger and half of the ring finger, as well as several hand muscles responsible for grip and fine motor function. Repeated elbow bending, prolonged pressure on the elbow, trauma, or arthritis can increase pressure on the nerve, leading to pain, numbness, and weakness in the hand