Migraine, dizziness, eye pain, deafness, rib pain, insomnia, frequent dreams, fever, high blood pressure, intercostal neuralgia, etc.

On the lateral side of the distal phalanx of the fourth toe, 0.1 cun from the corner of the toenail. (This acupoint is bilateral, one on each side.)

Sit upright with feet dangling or lie supine. On the lateral side of the fourth toe, the acupoint is located at the intersection of the perpendicular lines drawn from the lateral edge (which is also the junction of the palmar and dorsal sides, also known as the red and white skin boundary) and the lower edge of the toenail of the fourth toe.