There is no such thing as the best time to tap the Baihui point, which can be used for dementia, aphasia, insomnia, and vertigo. Baihui is an acupoint on the Directing Vessel, located in the head, 5 inches straight up from the center of the anterior hairline, with the right and left occipital static and arterial anastomosis network as well as the right and left superficial temporal static and arteries, in the capitulum tendon membrane, with the frontal nerve as well as the occipital large nerve branches. Baihui can be used for vertigo, headache, tinnitus; stroke, insomnia, dementia, aphasia, epilepsy, amnesia, hysteria and other psychosomatic disorders; yin ting (women with uterine prolapse or even prolapse from the vaginal opening), renal prolapse, prolapse of the anus, gastric ptosis, and other subluxation diseases caused by loss of qi retention (consolidation). Please do not perform needling and other operations on the acupoints by yourself to avoid risks, and if you feel unwell, please go to the hospital.