Why is Leech Application Point Important?

For the leech treatment to be effective;

When treating diseases with medicinal leeches, the point of application is very important. Acupuncture points are usually preferred. Also note that there are points where it is risky to apply leeches.

Leeches are not applied arbitrarily, for each disease the point of application and the number of leeches are different. Even the size of the leech is an important factor.