Some of the conditions that may cause hallucinations include migraine coma, schizoaffective disorder, psychotic disorder, schizophreniform disorder, Charles Bonnet syndrome and delirium tremens. Hallucinations are a kind of dreams that seem very real and are experienced when a person is wide awake, according to Health Grades.
One of the diseases that may cause a patient to hallucinate is Schizophrenia, which is a condition that mainly affects a persons behavior. This may greatly affect the person's ability to remain productive academically, professionally or socially.
Parkinson's disease mainly affects the central nervous system and results in involuntary movements or tremors. The disease has a strong effect on the brain, which is why an affected person is likely to experience hallucinations.
Focal epilepsy is a condition that is brought about as a result of abnormal electrical behavior in the brain. Among the symptoms that characterize this condition are hallucinations, movement of the eye from one side to another, sweating, nausea, dilated pupils and abdominal pain.
Another condition that may cause hallucinations regards development of brain tumors, which are growths that develop as a result of abnormal cell behavior in the brain. Some tumors may become cancerous and require urgent medical attention, while others are noncancerous and may be treated at a slower pace.