Can you increase the chances of catching a cold by exposing your neck and extremities in cold temperatures?

No, that is a myth. People always say that the cold temperatures weaken your immune system so that is why people always get sick in the winter. Truth is that your immune system is the same whether it is cold or warm. We tend to get sicker more frequently in the winter because we are often indoors and closer to other people, which allows for more transmission of the cold.