"Yuppie flu" is a 1980s name for chronic fatigue syndrome (CFS), reflecting the skeptical way the disease was first viewed. Medical experts now know that yuppie flu is a real condition that can seriously affect quality of life and health for half a year or longer.
People with yuppie flu generally complain of fatigue that doesn't improve with rest and means they must reduce their activity level by less than half or more of what they would normally do.
Patients with this condition have fevers that may come and go, muscle and joint aches, or feelings of weakness in the muscles. Sore throats are frequently reported, headaches may occur, and the lymph nodes can be sore and tender. Depression or anxiety can develop with these symptoms.
The exact cause of the condition isn't yet known, but there are standard and treatments which may prove helpful in recovery.