Known pelvic malignancy.

Patients with major depression with suicidal risk as clinically defined.

Patients with other known, uncontrolled neuropsychiatric disorders.

Abnormal neurological examination other than as signs of the condition studied in the present protocol.

Contraindication to tDCS:

A history of unmanaged substance abuse or dependence within the last 6 months.

A history of previous treatment with tDCS.

Effect of Repetitive Transcranial Direct Current Stimulation (tDCS) on Chronic Pelvic Pain