Chilblains turning purple is mainly due to the local skin inflammation caused by cold stimulation, where the congestion in the local skin accumulates and cannot be expelled. Chilblains turning purple may be accompanied by local skin itching or pain, thus timely medication is needed for relief. You can apply some protective oils and chilblain creams, and it is important to keep both the whole body and the affected area dry and warm. Gloves and shoes should not be too tight.