A good sign that Candida is on the loose is feeling “run down” and developing a craving for sugars and carbohydrates, as this is the main fuel for the growing amounts of yeast in your intestine. The more sugar and grains you eat, the more the yeast grows out of control. Eventually, this will weaken your immune system, which in turn can allow it to infiltrate various other organs.
This imbalance in intestinal flora, sometimes called dysbiosis, can also lead to other more common, and less lethal, health problems, such as: Vaginitis, Irritable bowel syndrome, Weight gain, Food allergies, Migraines, Asthma, Depression, Chronic fatigue syndrome and fibromyalgia
There are 79 different toxins released by the metabolism and die-off of Candida. This is why people with yeast overgrowth often feel so lousy; the Candida toxins are regularly entering their bloodstream. Two of these toxins, alcohol and acetaldehyde (the breakdown product of alcohol that causes hangovers), are in such high amounts in people with chronic yeast problems that you may actually end up feeling “drunk.”
Acetaldehyde also reacts with the neurotransmitter dopamine, which is why people with yeast overgrowth often experience mental and emotional disturbances such as anxiety, depression, poor concentration, and feeling spaced-out.
source: Dr. Mercola