Its hard for anyone to describe a symptom to someone else. In my case, the most striking symptom of uncontrolled AML aside from fatigue was myalgia, muscle aches. I had a concept of what the word meant: really a mild inconvenience.
In my case, this was so severe that I had to lift my leg with my hands to get into the car and that getting out of bed was extremely painful no matter how I organized my strategy. When my arms became affected it was almost impossible to shave.
After a brief period of antibiotics and chemo, the myalgias are gone. Apparently the multiple infectious and cancerous cell interactions that were producing a cytokine storm that was wiped out dramatically by therapy in about 36 hours.
I have a new appreciation for "muscle aches". In any event, I'm now feeling close to normal.