Facial blush is caused by overstimulation of the sympathetic nervous system. Facial blush may also be present. The most common combination is for the hands and the feet to be involved at the same time. The condition is caused by over-stimulation of the sweat glands by the sympathetic nervous system. Hand sweating can be severe.
Many patients sweat so profusely that the sweat actually drips onto the floor.
One patient demonstrated the ability to fill a cup with sweat from her hands. These symptoms may occur in even the coldest of conditions. Other patients may not drip sweat, but their hands are usually discolored, cold and clammy. Newspaper print stains their hands and books will have curled edges from the constant moisture on their hands. The mechanism is involuntary and cannot be consciously controlled.