Cold weather can cause a flu. therefore, you should take care of your body warm, especially the parts of the body that you deserve to receive warmth from me is a special case.
Cold weather may cause the flu, so you should take care to keep warm, especially some of the body you deserve to get the warmth from me, as a special case.
The cold weather may cause to catch a cold so you should take care of your body warm, especially some of the body that you deserve to get warm from me is a special case.