That quote was from a patient suffering from Chronic Fatigue Syndrome, but needless to say there are many causes of illness which have similar effects. Sadly doctors frequently have difficulty differentiating the ultimate causes and aren't always able to provide relief from fatigue.
Common symptoms include (but are not limited to):
continuous low grade fever
difficulties with short term memory
waking up tired on a daily basis
While any and all of these symptoms are attributable to a number of potential causes what should throw up a red flag for individuals suffering from Chronic Fatigue Syndrome is the continuous (hence: Chronic) nature of any or all of the aforementioned symptoms - the leading among them being always tired.
Sufferers Often Don't Know What's Going Wrong... or Even If Anything Is Wrong
As an example consider this patient quote: "Yet there I was, waking every day feeling lousy and being always tired. It just wasn't any way to live but I had been to the doctor numerous times, probably an average of three or four times a year for various ailments and just general malaise. It finally cam to a head one day this year when I had simply had enough. I was fed up with being always tired. I went to my doctor on a day I was feeling normal and said, 'Listen, today is like any other day for me, and I feel just plain lousy. I felt lousy yesterday, I feel bad today, and odds are pretty good tomorrow is going to be the same. I've had it!'"
Chronic Illness Comes from a Variety of Potential Culprits
Comments like these are common for people suffering from long term illnesses, whether it is an ingrained pitched battle with something like sinusitis, or perhaps continuing viral or strep infections. Inevitably what happens with these people feeling always tired is that something has got to give. Usually what gives ends up being the patient's spirit. Their desire to live life fully dwindles until they become a shell of their former selves. Sometimes it gets to the point where their own family members don't recognize the personality of their ill relatives anymore because they've become so withdrawn.
Diagnosis Perplexes Doctors
Diagnosis of chronic symptoms like these is extremely difficult for doctors because they are used to reacting to and treating short term issues, such as a cold or flu. Rest and relief medication are the normal prescription for short term sickness. Unfortunately many sufferers of longer term disease do not go back to their doctors after a few days when their being always tired has not subsided. Patients who trust their doctors too much and don't express the nature of continuing symptoms run the risk of not ever feeling better. Being always tired is just no way to go through life.