It’s been proven that having cold feet increases the risk of getting sick. Essentially, when your feet are cold, your body alters your immune system which results in you being more susceptible to illness and disease. This is because cold feet constrict the blood vessels in the body to prevent you from losing more body heat. As a result, your rate of blood flow slows down which affects your white blood cells that are meant to fight against sickness.
Plus, keeping your feet exposed to the cold greatly affects the tiny hairs in your nose that are meant to trap germs and bacteria from entering your body. Keeping your feet warm, essentially helps your nose work properly so you’re not constantly sniffling and having to blow your nose.
Basically, keeping your feet warm within a warm pair of slippers helps keep you healthy.