The back of the head and neck is most vulnerable to cold weather pathogens. Wear layers and always have a versatile scarf handy to protect against illness by laying it over the shoulders, wrapping around the neck or covering the head and ears. If you live in those really cold climes the scarf can cover the nose and mouth to warm the air before it dries the nose and throat. Even a light weight silk or wool scarf that can roll up small offers that essential assist to the immune system.
It is especially important to cover up this area after receiving cupping, guasha or massage to the neck and shoulders or when sweaty from exertion.
Try some Pine Needle Tea for an inexpensive vitamin C supplement. Chop fine and steep one teaspoon cleaned fresh pine needles with green tea or make a stronger solution with one tablespoon needles in 2 cups water, bring to a boil and steep covered for twenty minutes.
"The pursuit of health is invariably a spiritual quest."