How is it that the exposed part of the cold body itches to rubella?

The weather turns cold and the skin becomes itchy, which may be caused by skin allergy. The cause of skin allergy may be allergic to cold air, or it may be that the weather is cold, wearing too many clothes, chemical fiber clothes, wool clothes or other clothes that are easy to cause allergies in direct contact with the skin. If it is itchy skin caused by allergy to cold air, you can slowly adapt to cold air by jogging. If the allergy is caused by wearing chemical fiber clothes, it is best to wear cotton clothes.

Disease analysis:

According to your description, it is allergic urticaria, which is mainly caused by catching cold, and there will be symptoms such as dry skin, itching and red pimples.

Guiding opinions:

It is recommended to keep warm to avoid catching a cold. You can take chlorpheniramine tablets, vitamin C tablets and cyproheptadine tablets under the guidance of a doctor to avoid local irritation.