"Extreme exhaustion" refers to a state of being extremely tired and lacking energy or strength. It means feeling completely worn out physically or mentally due to overexertion or prolonged stress. Full definition
We have a lot of parallels and I was suffering from extreme exhaustion and adrenal fatigue. (healthfulpursuit.com)
Returning to work too early after childbirth can cause extreme exhaustion in a new mother as well as increase the risk for postpartum depression. (modernmom.com)
I witness the epidemic of extreme exhaustion on a daily... (mindbodygreen.com)