According to the National Alliance on Mental Illness (NAMI), about 1/5 of the United States personally experiences a disorder in a year. In fact, almost 7 percent of Americans had at least one instance of major depression in the past year, and more than 18 percent experienced an anxiety disorder. Here, GradSchools.com takes a look at some conditions that are so unique and rare that most mental health professionals never even encounter them.

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Unusual Psychological Conditions

Irma Wallace

Irma Wallace

Co-founder and Vice President of SearchRank, responsible for many of the day to day operations of the company. She is also founder of The Arizona Builders’ Zone, a construction / home improvement portal.

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