No. A shoulder sling is usually not compulsory for a distal radius transverse fracture. The key treatment is proper wrist and forearm immobilization with the splint or cast prescribed by the clinician.
A sling may be advised temporarily, especially during the first few days, because it can:
But wearing it continuously is often not necessary, unless your orthopedic clinician specifically instructed it. Prolonged sling use can make the shoulder and elbow stiff. Keep the fingers moving regularly if permitted, and elevate the hand above heart level to reduce swelling.
Seek urgent review if fingers become numb, blue/pale, increasingly swollen, cold, or pain is worsening despite medication, as a splint/cast may be too tight. Distal radius fractures are commonly managed with reduction when needed plus immobilization, as summarized in the
AAOS guidance.