Persistent, severe burning pain following injury to a sensory nerve.

• A. Neuralgia
• B. Paresthesia
• C. Causalgia
• D. Hyperalgesia

Answer: (C)

Persistent, severe burning pain after a sensory nerve is injured points to causalgia. This term describes a neuropathic pain that follows trauma to a peripheral nerve and is typically constant and burning in quality, often with autonomic signs such as changes in skin color or temperature.

Neuralgia, while also nerve-related pain, is usually sharp, shooting, or jabbing and can be episodic rather than a sustained burning sensation. Paresthesia refers to abnormal sensations like tingling or pins-and-needles without true pain. Hyperalgesia means an exaggerated pain response to a painful stimulus, not necessarily a persistent burning sensation after nerve injury. So the persistent burning pain described aligns best with causalgia.