An itchy scalp is a major indicator an individual has a yeast overgrowth. As it is tough to diagnose this on one's own, individuals may want to see a doctor if they feel their itchy scalp might be due to a yeast overgrowth or they cannot identify another cause. If individuals are constantly stressed, they may have a yeast overgrowth. This could also be true if individuals are eating a lot of fermented foods like pickles or beer, or even products like bread or bagels. Thus, individuals should check their diet prior to meeting with a doctor.