Since you are unable to move your wrist or lift objects after the fall, your symptoms could be caused by a wrist sprain, ligament damage, or even a minor fracture. Use a wrist brace or crepe bandage to restrict movement, rest the wrist, refrain from hard lifting, and apply ice for 15 to 20 minutes several times a day. If it's appropriate for you, painkillers like paracetamol might be helpful. It's crucial to see an orthopaedic physician and perhaps have an X-ray to rule out a fracture because movement is restricted following an accident.