Stress fracture in the ulna: what to know

The ulna runs along the little-finger side of the forearm. Repetitive throwing, racket sports, gymnastics, weight training or forceful gripping can load it repeatedly. Pain may be felt at a specific spot and can worsen when you rotate the forearm, grip, lift or lean through the hand. Mild swelling or tenderness may occur, while weakness can make ordinary tasks uncomfortable. A clinician will examine the wrist, elbow and forearm because nearby muscles, tendons and joints can produce similar symptoms. Initial X-rays may not show an early stress injury, so further imaging or review may be needed.

Stop the provoking sport, lifting or gripping and arrange an assessment. Keep the wrist and forearm in comfortable positions, but do not repeatedly press the sore spot or try to prove that it is better. A splint or activity restriction may be advised; use it as directed. Rehabilitation can later restore motion, grip control and strength before throwing or resistance work returns in stages. Discuss training technique, equipment and recovery time. If bone health is a concern, your clinician may consider evaluation for Vitamin D Deficiency and whether Vitamin D Supplementation is appropriate.

Seek prompt medical advice for pinpoint forearm pain that persists, returns with activity or limits grip and rotation. Get urgent help for a visibly deformed arm, rapidly increasing swelling, inability to move the wrist or fingers, new numbness, a cold or pale hand, or pain after a significant injury. These signs need immediate assessment even if the original discomfort began gradually.

Ask whether the ulna itself is tender, whether imaging should be repeated, what lifting and gripping limits apply, and how long protection is expected. Ask which forearm exercises are acceptable and what must happen before sport resumes.