Think of the cells in your feet like little workers. They need oxygen to do their job properly, just like people need air to breathe. Your heart pumps oxygen-rich blood to all parts of your body, including your feet.
But here's the problem: when your blood doesn't flow well, it's like these little workers aren't getting enough oxygen. When they don't get enough oxygen, they start to feel pain, tingling, and eventually, they can't feel anything at all.
In simpler terms, it's like your foot's nerve cells are suffocating because they're not getting the oxygen they need from your blood.