The vertical groove of the midline of the upper lip is one of the acupuncture points in the human body, and the acupuncture term is located under the nose.

The junction of the upper third and the lower half of the upper lip groove is the key point of emergency syncope. Indications: epilepsy, mania, epilepsy, stroke coma, convulsion, facial edema, backache.

Physicians in past dynasties believed that the human body was an important first-aid acupoint, and pinching or needling this acupoint was a simple and effective first-aid method, which could be used to treat heatstroke, coma, syncope, respiratory arrest, hypotension, shock and carbon monoxide poisoning during general anesthesia.