Have you taken your temperature with a thermometer? The reason I ask is if you have an elevated temperature, then colder weather would make you feel even more chilled. If your temperature has been normal, then a couple things could explain your feeling cold. Losing weight makes one more susceptible to cold. Also, as people age they tend to feel change in temperature more acutely. If you do have a fever, then you should talk to your doctor. He/she might want to assess you for a hidden infection. The doctor also might want to evaluate you for a reaction to the Humira. When I developed lupus from Humira, I ran a low grade fever for weeks.
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