There are eight points with action on some extraordinary channel. They belong to the 12 primary channels and cross with the extraordinary channel. They are points that allow access to the extraordinary channel. They come in pairs, one opens and the other closes.

Chong Mai and Yin Wei Mai

Treat chest and heart problems. Digestive or intestinal problems. Problems related to anxiety and agitation.

• SP-4 opens Chong Mai, closes Yin Wei Mai
• PC-6 opens Yin Wei Mai, closes Chong Mai

Du Mai and Yang Qiao Mai

Treat problems of back, shoulder, nape, neck, ear, inner corner of the eye.

• SI-3 opens Du Mai, closes Yang Qiao Mai
• BL-62 opens Yang Qiao Mai, closes Du Mai

Dai Mai and Yang Wei Mai

Treat problems of lower back, hip, pains radiating to the abdomen or side of the leg. Problems in the outer corner of the eye, ear, temporal headache, neck, nape, trapezius.

• GB-41 opens Dai Mai, closes Yang Wei Mai
• TE-5 opens Yang Wei Mai, closes Dai Mai

Ren Mai and Yin Qiao Mai

Treat problems of chest, lung, reproduction, menstruation, throat, nose, spine, sleep.

• LU-7 opens Ren Mai, closes Yin Qiao Mai
• KI-6 opens Yin Qiao Mai, closes Ren Mai