Which symptom is commonly observed in CRPS type I but is not exclusive to the condition?

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CRPS type I often shows trophic changes in the affected limb, including bone demineralization. This osteopenia arises from a combination of disuse due to pain and sympathetic dysfunction that alters bone remodeling, tipping toward more resorption. On imaging, regional osteopenia in the involved area is a common finding, especially as the condition becomes chronic, and it helps support the diagnosis when seen with the typical pain and autonomic changes. But bone loss isn’t unique to CRPS; immobilization, aging, or other bone conditions can produce similar changes. The other signs listed—excess sweating, redness, and increased warmth—are also seen with CRPS, particularly early on, but they are more nonspecific and can occur with many other vascular or inflammatory processes.