Recovering well but Severe chills

[Lewis]

so after few years of chronic CFS I am recovering well. I treated lyme disease and coinfections depsite negative test results and doing really well. Now I only suffer from severe chills that wake up at night. Apart from chills I am pretty well and can manage things if I pace myself. Light exercise, working etc

Does anyone know what causes chills? I am unsure if its a symptom of coinfection that hasnt been treated or is it a virus like ebv?

You can follow my recovery on my blog

www.purojuice.uk