CRPS-Hand: Contrast + Compression vs Whirlpool

Inclusion Criteria: * Patients diagnosed with Complex Regional Pain Syndrome Type 1 (CRPS-I) according to the Budapest Criteria * Age between 18 and 80 years * CRPS developed following upper extremity trauma (e.g., hand or wrist fracture, soft tissue injury) * Symptom duration less than 3 months (subacute stage) * Ability and willingness to provide written informed consent and voluntarily participate in the study Exclusion Criteria: * Patients diagnosed with Complex Regional Pain Syndrome Type 2 (CRPS-II) or with evidence of peripheral nerve injury * History of peripheral neuropathy, Raynaud's phenomenon, or vascular circulation disorders * Presence of impaired skin integrity, open wounds, infection, or dermatological disease in the affected area * History of cold or heat intolerance, cold urticaria, or hypersensitivity to thermal modalities * Active infection or severe edema in the affected extremity * Presence of serious systemic diseases (cardiovascular, pulmonary, renal, or neurological) * Receipt of similar physical therapy or modality-based treatment within the past 3 months