If I have foot pain, should I position the device closer to my foot?

No, you should position the device on your upper calf 1-2 inches below the knee as described in Chapter 2 in the comprehensive user manual. If you cannot place your Quell device at the recommended location just below the knee due to situations such as wound or skin irritation, then you may position the device at mid-calf or above the knee on the lower thigh.  The device should be recalibrated at the new site before initiating therapy.