Hallucinations
Hallucination is not just limited to seeing things that are not there. It is generally about sensory experiences like seeing, feeling, hearing, smelling, or thinking about unreal things. It should be a product of a false perception created by the mind. For example, visual hallucinations involve lights, patterns or people that are non-existent. Olfactory is smelling unpleasant or pleasant odor opposite to reality. Gustatory involves the sense of taste; auditory is hearing sounds like someone is walking, tapping, heels clanking, or clicking noises; tactile hallucination involves feelings of movement in the body, like insects crawling and crouching.
Some people hallucinate in the middle of the night, after waking up, or after several hours of working without falling asleep. Some also are caused by drug consumption; these happen often. However, experiencing hallucinations may also imply that the body may have health conditions that are not yet discovered. Some medical conditions include epilepsy, schizophrenia, Parkinson’s disease, or hypocalcemia (calcium deficiency). People who have hypocalcemia tend to get affected neurologically and psychologically over lengthened time; hallucination is one symptom, along with many others, such as memory loss, depression, and mild delirium.