👉 Hallucinations are a type of mental experience that involve the perception of non-existent or imaginary entities, typically in a visual, auditory, or olfactory manner. They can occur as a result of various factors such as stress, anxiety, medication, or illness. Hallucinations can be described as subjective experiences, not real phenomena, and they are often accompanied by symptoms like disorientation, disconnection from reality, and altered perceptions.