Sensory Testing: Patients will also undergo sensory testing at baseline and at the end of the study period. Sensory testing will include: 1) Pressure pain threshold will be measured by a hand-held, digital algometer as described by Fillingim et al at three different anatomical sites: center of right upper trapezius, right masseter, and the right ulna; 2) Cutaneous mechanical pain testing- Assessment of temporal summation of mechanical pain will be done using nylon monofilaments tested on the dorsum of the hand.; and 3) Thermal sensory testing will be performed using Q-Sense Small Fiber Test, which offers a scientifically validated measure of warm, cool and heat-pain thermal sensory thresholds.