Abnormal cutaneous sensations of tingling, numbness, pressure, cold, and warmth that an individual experiences without the presence of a stimulus. It results from functional disturbances of sensory neurons. Causes include peripheral vascular disease, peripheral neuropathy, and nerve damage OR A disorder characterized by functional disturbances of sensory neurons resulting in abnormal cutaneous sensations of tingling, numbness, pressure, cold, and warmth that are experienced in the absence of a stimulus.