Cranial Electric Stimulation (CES)
CES is a noninvasive procedure that has been used for decades in the United States to treat anxiety, depression, and insomnia in the general population. CES is therapy that a person can do at home. Although there are studies that show CES was helpful in generalized anxiety and OCD (Feusner, Kerwin et al., 2008), the test had a small number of patients, and in future tests it did not show any more difference than the placebo for depression (Carel, Eugster et al., 2009).
Bystritsky, A., L. Kerwin, et al. (2008). “A pilot study of cranial electrotherapy stimulation for generalized anxiety disorder.” The Journal of clinical psychiatry 69(3): 412-417.