This point is fabulous because it can be used to treat pain and tension (physical and psychological), which includes many problems: headaches, constipation, insomnia, stress, tense shoulders and neck.
Names:
Hoku, Union in the Valley, Large Intestine 4, LI4
Where:
Hoku is located on the top of the hand in the hollow intersection space between the thumb and the forefinger.
How to stimulate this point:
Place the thumb of the other hand on the point, and the other fingers resting on the palm. Make small circular motions with your thumb until you feel the point. It is often sensible.
The hand holding the point should be relaxed.
Well positioned but tense hands:

Well positioned and relaxed hands:

Hold for 10 to 15 seconds, and adapt according to the state of the point. When the point is released, you feel a surge of Ki, like a dam giving way. Wait until the flow subsides before removing the thumb.
If you need to stimulate the point for longer, be careful not to clench your hands. Adjust the pressure according to the pain: Slightly release in case of excessive pain.
[This information is given for educational and recreational purposes. Consult a healthcare practitioner if you are sick].
Thanks for good & deep knowledge.
Best natural health