Can yeast overgrowth be the cause of my anxiety, brain fog, and facial lip rash? Diflucan (fluconazole) cleared rash for a month.

Avoid sugary foods. If you have a problem with yeast, the cure is to avoid sugary food, including foods that turn into sugar after you eat them, like bread, cereal, pastries, and pasta. You may also have a problem with the immune system that makes you susceptible to yeast infection. Or you may have another infection such as epstein barr virus that has weakened your system. This would need a doctor's help.