What is the ruling on the clear, colorless, and odorless liquid that comes out from under the heel due to excessive wearing of shoes, and is it impure or pure?

The fluid that exits due to excessive wearing of sandals, if it is sweat, is pure. However, if it results from the chafing of the skin due to the sandals, it is impure, but it is pardoned if it flows on its own without any human intervention. As for what is attributed to the Shafi'is concerning the fluid from sores, it is pure if its odor has not changed; otherwise, it is impure.