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If you seek medical treatment to discuss whether you have a chemical imbalance, ask questions of the medical professional—ideally a psychiatrist or psychotherapist rather than a general practitioner, internist, or "family practice" physician. That person should consider various questions to determine what kind of imbalance is present; for example:
Do I have autonomic hypersensitivity?
Do I not have enough serotonin?
Do I have allergies?
Do I have a medical condition that would impact anxiety?