If your muscles start to twitch. This may mean that the TENS signals are too strong or too fast. If you cannot feel any tingling at all. This may mean that the signal is too weak or too slow.
The electrodes should be removed at least once a day if the TENS treatment is used around the clock. The skin under the electrodes must be checked to see if it is red or tender. The skin should also be cleaned and dried while the electrodes are off. Put lotion on your skin where the electrodes were placed. The electrodes should be put in a new place for each new treatment. This will help prevent the skin from becoming red or sore.