It's winter and my nosetip is red, sore, v v cold. I have chilblains, raynauds fingers, never nose. Nose has no blister/pimples. Nose chilblains?

May be. Chilblain can affect any acral part, though fingers are the most commonly affected part. I trust that you know that you need to keep warm, by dressing in layers to keep the whole body warm. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.