Burnout is now classified as a disease. 
“The World Health Organization (WHO), an agency which guides many health providers and organizations, now includes “burnout” in its International Classification of Diseases (ICD) Handbook, where it is described as “an occupational-related condition resulting from chronic workplace stress that has not been successfully managed.
According to the WHO, doctors can issue a diagnosis of burnout if a patient exhibits three symptoms: feeling depleted of energy or exhausted; feeling mentally distanced from or cynical about one’s job; and problems getting one’s job done successfully. The WHO notes that burnout is to be used specifically “in the occupational context” and that it “should not be applied to describe experiences in other areas of life.” 
I don’t agree with the limited context as l feel that if you have reached a point of burnout at work, you have also reached that point in other areas of your life. Feeling stressed, depleted, exhausted and mentally distanced cannot be confined and isolated to the workplace.
If you are feeling this way, please reach out for help. There are many caring and experienced practitioners out there who can support and help you navigate your way back to health. 

Wishing you wellness,

Mary Clark