Why I feel too cold in winter and too hot in summer? more than others?

in winters,I wear lots of sweaters and jackets while others dont wear that much of clothes!
and if I wear lighter dress I feel cold and I sneeze immediately!

in summers,I cant sleep without covering a moist fabric on my feet! I cant stand and bear wearing a long pants,I just can wear skirts and shorts..!!

why this happens? why my body is not that strong?

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