Why is it so cold or easy to sweat?

Maybe it's because you wear more clothes and are thicker. Although it is quite cold outside, indoors, such as in the subway and office, your body temperature will rise, and you will naturally feel hot and sweat easily. Sweating should be caused by bacteria. Sweating is normal, but if you are troubled by the smell of sweat, it is recommended to use antiperspirant deodorant.