It is commonly thought that a fever means you have an infection

 somewhere in your body,

and your body is fighting it off. 

For those who have been exposed to an autoimmune causing chemical,

such as 2-butoxyethanol,

it might also mean your hypothalamus is being attacked

by the immune system.

• Having unexplained fevers, or too low a body temperature are one sign of that
• Having blood sugar high or low,
• Having high or low blood pressure
• Up and down emotions and sexual response ....

The hypothalamus controls the pituitary

AI Hypothalamus?