**7. Indication for scalp acupuncture on mental disorders**

There has been a long history of utilizing acupuncture in treating mental health problems and "mind-related" syndromes in ancient China. However, scientific literatures and clinical trials on acupuncture for mental problems had not been recorded until 1980s. Despite numerous clinical observations and controlled trials that have been made since then, evidences have remain insufficient to draw a definitive conclusion on the general use of acupuncture on psychiatric patients. More high-quality controlled trials with greater sample size and longer follow-up period are clearly needed in order to advocate the use of scalp acupuncture for treating mental illness.
