Hallucinations may be caused by different conditions.
1. Drugs either prescription medications or street drugs can cause hallucinations.
2. Alcohol either its intoxicating effects or withdrawal from it
3. Medical Illnesses like brain tumors, high
feverAllergic rhinitis
Coccidioidomycosis
Febrile seizures
Fever
Fever blister
Fever blisters and canker sores
Herpes labialis (oral herpes simplex)
Histoplasmosis
Malaria
Rheumatic fever
Scarlet fever due to an infection may also be a cause of hallucinations.
4. Psychiatric problems like schizophrenia or depression may be the cause of hallucinations.
Treatment depends on the cause of the hallucinations. The discontinuance of alcohol or any drug-causing hallucinations will stop the hallucinations.
Treating the primary medical problem also stops the hallucinations.
With psychiatric problems, if this is mainly caused by depression, treating the depression with antidepressants ususally helps in the treatment of he hallucinations. In schizophrenia, it is necessary to be medicated with an antipsychotics like Risperdal to lessen or treat the hallucinations.
I recommend seeing a psychiatrist to determine what is causing the hallucinations.