Feet in tight shoes freeze in winter and get very hot in summer. Explain why?

1) Tight shoes squeeze blood vessels, so blood circulation is impaired, which is involved in the regulation of body temperature. In winter, this leads to the fact that warmth with blood practically does not reach the lower part of the legs (to the feet), and in summer, due to the heat, the legs cannot cool.

2) Also, with close contact, there is practically no air gap, which also acts as a heat insulator. In winter, the legs do not warm up, and in summer, due to the lack of air circulation, the foot is not ventilated, and it heats up. At the same time, the legs sweat a lot, which can provoke the development of the fungus.