Skin Temp Variation Large Number

[KkGriffith30]

I understand how skim temp variation works that it shows how high or low I am from my baseline. However, my concern is that I see people talking about +1 or +2 or even +/-7 but never anything higher than that. My temp variation last night was -12.8. Should I be concerned with how low that is? 

[JuanFitbit]

@KkGriffith30 , A warm welcome to the Community! Thank you for your message and information. 

Skin temperature is the temperature on the skin's surface. It typically varies more than your body temperature, since warming up or cooling down the skin is one way the body regulates itself and keeps body temperature stable. Some Fitbit devices use a sensor to estimate your baseline skin temperature, based on up to 30 days of data. Each morning, you can check how your skin temperature from your last sleep period compares to your personal baseline. You'll notice this information as your skin temperature variation (whether your skin temperature was higher or lower than your baseline).

Skin temperature typically varies over the course of a sleep session. Factors that may cause skin temperature to vary include changes in room temperature, bedding, circadian rhythm, menstrual cycle, or the onset of an illness.
Note that significant changes in ambient temperature may negatively impact skin temperature tracking.

Taking into consideration the factors described above, I would see the trend in the next few days and then if you are still having doubts, you could visit your health carer. They would likely explain to you why your skin temperature might vary.