 [ Symptoms ] can toenail fungus cause fatigue and dizziness  i have been extremely fatigued and get dizzy a lot any can not figure out what is causing it i have been to the dr a few times for it and had blood work done  thyroid iron cbc b12 cmp a1c and everything has come back normal i feel like a zombie i get plenty of sleep most nights 7 hrs i have had a fungus or something on my left big toenail for a couple yrs and i am wondering if that could be causing me to feel like crap [ Disease ] toenail fungus will not cause systemic symptoms but if your immune system is somewhat weak or challenged you would be more prone to getting a fungal infection this would be the only likely association if you feel poorly it is not due to the toenail issue