There can be a few reasons why someone may experience cold feet. One possibility is that there’s something wrong with the veins in their feet, which can cause them to become sluggish and cold when it’s cold outside. This can also be the result of a medical condition such as diabetes, high blood pressure or a circulatory disorder.
Other causes of cold feet could simply be psychological, such as if someone tends to feel anxious in cold weather or has difficulty coping with new situations. In some cases, this might manifest as an inability to stay put for more than a few minutes at a time, no matter how safe and enclosed a space feels.