Chilblains are painful lesions on the toes that only happen seasonally in the colder climates. They occur due to a spam in the very small muscles that control the diameter of the small blood vessels that are warmed by too quickly after they are cold. This causes damage to the tissues and releases inflammatory mediators. The result is the above red and painful lesions on the toes. Despite being a common problem, there are still many aspects of chilblains that are not fully understood.
The best way to deal with chilblains is to not get them in the first place. They can be prevented by keeping the feet warm with good socks and footwear. If a chilblain does develop, then the best way to deal with them is use a soothing cream that can stimulate the circulation. If the skin is broken, then the area needs to be properly protected to prevent infection and facilitate the healing of the wound.
This chilblains video from PodChatLive is an in-depth look at the topic of chilblains: