
This is the natural instinct of medical leeches. Under natural conditions, they hibernate at the bottom of the lake, buried in the ground, where the water does not freeze and fall asleep until spring comes. If you decide to use medical leeches for Hirudotherapy during the winter season, the leeches you have chosen for therapy must be active to stimulate blood flow. To do this, before you continue to put the medicinal leeches on your body, separate them in a jar of "useless" cool water - neither cold nor hot, and put them in a warm room for a while.
The heat activates the medical leech, making it active, ready for treatment. So, if it is winter and the temperatures are negative, follow these instructions to make sure that the Hirudo - Medicinal leeches are interested in blood and bites.