In general, Transcranial direct current stimulation (tDCS) is regarded as a safe, convenient, and non-invasive stimulation of the brain. The adverse effects of tDCS are still not fully known, although the side effects that have been identified so far are minor and limited to the location of the electrode. Transient redness of the skin, tingling, impaired skin sensations, and itching are among the common short-lived side effects. Other reported side effects of tDCS include dizziness, headache, and nausea. It should be emphasized that these last three side-effects have been shown to occur at a rate that is near identical to that of sham stimulation in several studies (fake stimulation) When tDCS is performed improperly, other side-effects can occur, such as photophobia, which is a brief, harmless sensation of a burst of light is flashed into the eyes. This might happen if the electrodes are placed too close to the eyeballs. In addition, inappropriate tDCS delivery might result in ordinary skin burns when performed incorrectly. There is no scientific evidence to support the claim that tDCS causes long-term harm or irreversible negative effects. Although it should be mentioned that all of the tolerability and safety data on tDCS comes from controlled human trials using specialist equipment and highly controlled methods (e.g., limiting the intensity and duration of current, number of sessions).