New criteria for diagnosing mental disorders could have many more people labeled as "ill," and has left some doctors wondering if anyone will be "normal" anymore.

The Diagnostic and Statistical Manual of Mental Disorders, published by the American Psychiatric Association, is used by mental health professionals to correctly diagnosis patients with particular mental disorders and has long-been viewed as the "bible" for those in the mental health world, Reuters reports.

The manual provides clear definitions for "disorders" so professionals can correctly treat patients and drug companies can develop new products.

This new edition, set to publish in May 2013, includes descriptions, symptoms and other criteria necessary to diagnose people with "disorders" such as "mild anxiety depression," "psychosis risk syndrome" and "temper dysregulation disorder," none of which have been previously recognized by the APA.

But, at a recent briefing, experts warned that this updated DSM has the potential to diminish the severity of mental illnesses, as well as label healthy people as sick. This is because other new disorders that are being considered for listing in the manual include toddler temper tantrums and binge eating, Reuters reports.

"It's leaking into normality," Til Wykes, of the Institute of Psychiatry at Kings College London, said. "It is shrinking the pool of what is normal to a puddle."

Wykes along with Felicity Callard, also of Kings' Institute of Psychiatry, published their concerns in The Journal of Mental Health.

"Technically, with the classification of so many new disorders, we will all have disorders," Wykes and his colleagues said in written concerns. "This may lead to the belief that many more of us 'need' drugs to treat our 'conditions' -- (and) many of these drugs will have unpleasant or dangerous side effects."

Dr. Daniel Carlat, AOL Health's mental health expert, says he believes the concerns are exaggerated because doctors should be considering several other factors about patients' symptoms, such as if they truly affect their work, relationships, concentration and sleep.

"But, we always want to avoid falsely stigmatizing a patient, because that can itself lower their self esteem," Carlat tells AOL Health. "It's always hard to know if this is over-diagnosis versus more accurate recognition of problems that have been missed in the past."

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