In German Electro Acu by Voll freqs are input via sp 6 (acupoint) which is 3 cun or 4 fingers width above medial malleolus, on the posterior border of the medial aspect of the tibia. This is your ankle but higher up when you find the point odds are it will be very sore this goes right to the digestive system eliminates dampness (aka parasites). I have not done it in a while think I will try it!
Alex