If you think you hear someone say something but they didn't, it is typically referred to as an auditory hallucination. Auditory hallucinations involve perceiving sounds or voices that are not actually present in the external environment. These hallucinations can be quite vivid and may be perceived as coming from inside one's head or from an external source, even though no real sound is occurring.
Auditory hallucinations are most commonly associated with conditions like schizophrenia, but they can also occur in other psychiatric disorders such as bipolar disorder, major depressive disorder, and substance use disorders. Additionally, they can sometimes be linked to medical conditions or as side effects of certain medications.
It's essential to consult a qualified mental health professional if you or someone you know experiences auditory hallucinations or any other concerning symptoms. A proper evaluation can help determine the underlying cause and guide appropriate treatment and support.