Pain and side effects

Many people with RUS do not have significant pain. Others describe discomfort at the elbow, wrist, forearm, or shoulder — especially after repetitive or forceful activity.

New, persistent, or worsening pain deserves medical attention. Seek prompt care after a new injury or for sudden weakness, numbness, swelling, color change, or severe loss of function.

Locking, snapping, or clicking at the elbow

Some people with fusion near the elbow describe painful locking or a clicking or snapping sound when fully straightening or bending the joint.

The original site links to a case report in which an annular ligament near the elbow caused snapping in a person with congenital radioulnar synostosis. Surgical removal helped in that individual case; it should not be read as a general treatment recommendation.

The legacy guide also named a TubiGrip-style tubular elbow sleeve as one way some people reduce strain, clicking, or mild pain. Persistent locking or pain should be assessed by a clinician.

Read the snapping-elbow case report

Wrist and shoulder pain

When forearm rotation is limited, people may use extra movement at the shoulder or wrist to position the hand. Repetition and overcompensation can contribute to discomfort in those areas.

A clinician or therapist can help identify safer movement patterns and ways to manage symptoms, even when the bony fusion itself is unchanged.

Read about compensation and function