Headache and cold would come after the sudden change of temprerature after snowing. Mecical experts found that some diseases have something to do with carelessness in keeping warming. Doctor of Chinese believe that head, chest and feet are easily to be freezed, so we should remember the following three notes of keeping warm in cold days.
Head
People will feel headache and faint because of contraction of blood vessels caused by coldness. So, for cerebrovascular disease patients, coldness is easy to induce the disease. As a result, to keep head warm is quite important.
Chest 
In winters, wearing a neckpiece to prevent chill is just like wearing more clothes. Heart diseases or gastroenteropathy are easy to be induced if your chest and stomach get cold, so it is necessary to keep chest and stomache warm.
Feet
Coldness comes from feet. Once feet get cold, the contraction of capillaries of respiratory tract mucous membrane will be caused reflexophilly and the resistance to diseases will increases. As a result, people will get infection of respiratory tract. It is important to keep feet warm in winters.

In severely cold days, experts remind people to wear different clothes according to changes of weather firstly. Secondly, people suffered by cardiovascular and cerebrovascular diseases, arthritis and digestive disease should pay much more attention to keep warm and go to hospital for examination as soon as possible if they feel something wrong. Lastly, wearing a hat, a scarf and a pair of warm shoes is the best choice.