Freezing cold after gastric sleeve

I know people that have lost weigh sometimes complain about being cold. My issue is I started my journey with a very high BMI and was able to bring it down 20 points prior to surgery. I am 3 weeks post op and 30lbs down. I am freezing cold and no one around me is cold. Like I said I lost significant amount prior to the surgery and I was fine. I am not sick just freezing all the time. Is it related to the rapid weight loss, the weight loss period or not at all.

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