The nervous system is a complex network of nerves with electrical charges that are in every inch of your body, around every organ and extend through the entire skin, the largest organ of the body.
Abnormal nerve impulses caused by anxiety can cause a whole range of weird feelings. Although quite harmless, they can be very annoying. You can for example have a feeling that you are plugged in with electric shocks to the hands, legs, feet, hands and chest.
The reduction of general anxiety and proper performance of breathing exercises help a lot, and when the concentration of anxiety is reduced, these symptoms will disappear. Do not focus on them, and turn thoughts to something else, subtract them and they will disappear.