Spot Dx — Can you cast some light on this severe itching?

Ali, a 31-year-old recreational equestrian, develops severe itching and burning under a cast.

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Ali is a 31-year-old recreational equestrian who sustained a right distal radial fracture three days ago after being thrown from her horse.

An X-ray in ED confirmed a simple non-displaced distal radial fracture. Ali was placed in a short-arm plaster backslab, advised to take simple analgesia if required and to monitor for neurovascular compromise before returning to the fracture clinic in a week.