A 38-year-old female carpenter from Mumbai presents with a 2-week history of sudden onset pain and tingling in the medial hand and medial forearm. On examination, there is no motor weakness, but she has hyperesthesia and allodynia over the medial 1.5 fingers and medial palm. Tinel's sign is positive at the wrist (not at the elbow). What is the most appropriate next step in management?