G90: Disorders of autonomic nervous system

G90.6: Complex regional pain syndrome type II

Complex Regional Pain Syndrome Type II (CRPS II) is a severe, chronic pain condition typically affecting one limb, such as an arm, leg, hand, or foot. This condition often occurs after a significant nerve injury. Unlike Complex Regional Pain Syndrome Type I (CRPS I), in CRPS II, there is a confirmed nerve damage. The pain associated with CRPS II is usually greater than the original injury’s expected recovery time and intensity. Symptoms often start with pain, swelling, and skin changes such as color or temperature alterations appearing in or near the affected limb. Over time, the affected limb may experience changes in muscle strength and function. This condition has an unpredictable disease progression, as symptoms may resolve over time or can become chronic. Its cause is not entirely understood but may involve abnormal responses to nerve injury.