Buzz
Hallucinations aren't just symptoms of mental illness. In fact, they are more common than most people realize. Healthy individuals can experience vivid visions triggered by everyday things like coffee, medications, or even looking at a loved one.
The world of hallucinations is filled with mystery. Some individuals suffer from severe hallucination disorders that remain largely unexplained and resistant to treatment. Experts are still puzzled by phenomena like police officers experiencing visions through touch, or why so many grieving individuals claim to see deceased loved ones.
1 in 20 People Experience Hallucinations
A study by the World Health Organization, which interviewed 31,000 people across 18 countries, aimed to assess mental health. However, the survey revealed an astonishing fact: approximately 1 in 20 individuals reported having at least one hallucination during their lifetime, without any involvement of drugs, alcohol, or dreaming. These were just regular, healthy individuals.
Participants with psychotic conditions were excluded from the study, though it's possible some undiagnosed individuals were included. Still, this didn't explain the surprisingly high rate of hallucinations, which appeared to occur slightly more often among women, singles, and the unemployed. Perhaps the most surprising takeaway was that hallucinations were no longer seen as exclusive to severe mental illness. The majority of the participants were healthy, well-functioning individuals with ordinary lives.
The frequency of hallucinations raised more questions than it answered. The researchers couldn't determine why one-third of the participants had experienced only a single hallucination, while another third had two to five such episodes throughout their lives.
9. Caffeine as a Hallucination Trigger
If you're sipping your fourth cup of coffee and suddenly spot clowns swinging from the chandelier, don't panic—you're not losing your grip on reality. The cause isn’t a mental disorder; it's the coffee. In fact, you could blame anything that contains caffeine.
The threshold for hallucinations seems to be around 315 milligrams of caffeine. This is roughly equivalent to three cups of brewed coffee, six cups of tea, or nine cans of cola. Even one strong café coffee can bring you close to this limit. After reaching this amount, the chances of experiencing auditory or visual hallucinations are three times higher than before.
The cycle can be relentless. When individuals experience hallucinations caused by caffeine, the underlying reason often remains elusive. Like countless others, they turn to tea or coffee for emotional relief, and may end up consuming more as they try to deal with stressful situations. Caffeine is a stimulant that triggers the release of cortisol, a stress hormone, which amplifies anxious thoughts: more stress, more coffee, and more hallucinations.
8. The 10-Minute Experiment
There is a simple test that anyone can try, and for those who are vulnerable, it could lead to strange experiences. This experiment lasts for 10 minutes and involves staring into another person's eyes. That's all it takes. Some believe that doing this with a loved one yields the best results, and it's definitely less awkward than locking eyes with a stranger on the bus.
Created by Giovanni Caputo, an Italian psychologist, this test was conducted with 20 participants to observe if such an act could alter their perception. After the couples stared at each other for 10 minutes, the results were intriguing. Along with creating a sense of disassociation, the group experienced hallucinations as though they were being paid. Strangely, they reported experiencing only specific types of visions.
About 90% of the participants saw their partner’s face contort into some form of distortion. For 75%, a monster appeared. Oddly enough, half of the participants claimed that the face they were staring at transformed into their own, and 15% saw their partner shift into a relative.
7. They Can Occur Even While Sleeping
Sleep-related hallucinations are a type of sleep disorder classified as parasomnia, involving unwanted experiences that occur during sleep. These hallucinations can seem incredibly real and are primarily visual, though they can also involve other senses such as sound, touch, taste, and smell. In some cases, they can even create a sense of motion.
It’s easy to mistake them for a dream state. You may find it hard to distinguish between being awake and asleep. While similar to nightmares, the key difference is that when you wake from a nightmare, you immediately recognize it as a dream and understand it’s not real. Sleep-related hallucinations, on the other hand, may present as vivid visual images of people or animals, often occurring right after waking abruptly. Initially, you may feel frightened, thinking the images are real, and might even jump out of bed in panic.
Sleep hallucinations usually happen at two distinct times: either as you're falling asleep or as you're just waking up. They can also indicate narcolepsy, particularly if they occur during the daytime. It's not uncommon for sleep hallucinations and sleep paralysis to happen together. In some cases, they can occur alongside episodes of sleepwalking or sleep talking.
A woman recounts her experience with sleep hallucinations. After a long day, she went to bed later than usual and quickly drifted off due to exhaustion. But instead of waking up naturally in the morning, she half-awoke in the middle of the night. In the darkness of her room, she suddenly realized she couldn’t move her body, and a chilling sensation crept over her—something or someone was watching her. A heavy pressure seemed to weigh on her chest, and even though she could move her eyes slightly, it was too dark to see anything. After a moment of panic, the feeling subsided. She was then able to stumble to the bathroom, splash water on her face, and calm herself from the terror she had just experienced.
6. Fake Voices Drown Out Real Speech
Schizophrenia is marked by the perception of things that don’t exist, including hearing voices. These voices can range from soft whispers to loud and abusive shouts. This troubling symptom adds to the distress of individuals already grappling with this challenging mental illness.
In 2012, researchers sought to find a method to help schizophrenics ignore the hallucinated voices. To do so, they first needed to uncover the brain's role in this phenomenon. It was crucial because hearing involves not only the ears but also various regions in the brain. The results were both surprising and unsettling, but ultimately they provided the first real hope of eliminating these fabricated voices.
Unexpectedly, the hallucinated voices proved so overpowering that they drowned out the real ones. A strange malfunction in the brain activated speech-related regions when no one was talking (causing verbal illusions) and deactivated them when actual speech occurred. The glitch was so strange it seemed almost impossible. In fact, the researchers couldn’t find any reference to this phenomenon in medical literature. However, their brain scans confirmed that the glitch was real and intense.
The breakthrough allowed for the development of an iPhone app designed to retrain the brain to respond to voices in a normal way. One woman reported a dramatic improvement in her ability to cope with the voices in her head. If more patients experience similar success, this research could lead to a groundbreaking treatment for schizophrenia.
5. A World Full of Dragons
For years, hallucinations plagued a Dutch woman’s life. The patient, who remains unnamed, lived in constant fear of looking at others, as their faces would morph into dragon heads. When she made eye contact, the person’s face would elongate and turn reptilian, with ears growing longer, skin darkening, and eyes becoming large with vibrant irises.
Some might jokingly link this to the “reptilian aliens are among us” theory, but the woman was not one of those believers. Her condition was entirely real and debilitating. She struggled to keep a job, as conversing with dragons interfered with her social life. To make matters worse, the dragons emerged from electrical outlets, computer screens, and even shadowy corners.
Her condition was identified as prosopometamorphopsia. The cause remains unknown, but it results in distorted facial perceptions. In the case of this 52-year-old patient, the recurring dragon-like images were particularly perplexing. Despite numerous tests—including blood work, brain scans, and neurological evaluations—nothing abnormal was found. Fortunately, after multiple treatment attempts, one based on informed guesses, the anti-dementia drug rivastigmine reduced the dragons, and the patient was able to return to work.
4. The Psychotic Side-Effects of Malaria Medication
When taken once a week, Lariam helps to prevent malaria. But in certain cases, the drug causes terrifying side effects. One of the most shocking stories is that of Tim Notee, a 20-year-old student who took Lariam in 2012 just before traveling to Ghana.
The side effects began while he was still in the Netherlands, packing for his trip. His thoughts became so disoriented that his mother had to take over the task of preparing for his journey. Upon arriving in Ghana, the hallucinations started. He saw entire walls shifting, and he became convinced that he shared a body with a grasshopper. Within a week, his grip on reality completely unraveled. Notee came to believe that Jesus was his older brother, that he had a personal relationship with God, and even began drafting his own religion.
Notee believed he could perform miracles, shaved his body to appear more Ghanaian, and promised his concerned father that they would meet Bruce Springsteen. He became seriously ill and was hospitalized, where a doctor immediately identified the side effects of Lariam and instructed him to stop taking the medication. However, by this point, Notee was no longer simply 'God’s second son.' He had become Jesus and openly declared it to everyone.
He was flown to an emergency clinic where he claimed that his blood could cure malaria. At one point, staff had to physically restrain him when he tried to escape his treatment. His hospital room's TV started 'communicating' with him. Afterward, he fled the hospital and ended up at a local TV station. After three manic weeks in Ghana, Notee was finally flown back to the Netherlands and admitted to a psychiatric facility. Treatment with anti-psychotic drugs nearly left him in a zombified state, but after some time, Notee made a full recovery.
Alarmingly, one in ten people experience severe side effects from Lariam.
3. They Spread Via Touch
In 2016, a woman in Oregon experienced something disturbing. The 54-year-old called the police, insisting that eight people were attempting to remove the roof of her car. Since it was 3 am, she believed they were stealing or vandalizing her property. However, when the officers arrived, there was no sign of the culprits, and the car appeared untouched.
The woman phoned a second time, claiming the thieves had returned and were cutting into the car. This time, the police didn’t arrest anyone. Instead, they took her to the emergency room for hallucinations. She was examined and cleared as fit to go home. But the situation didn’t end there—soon, four others began experiencing the same hallucinations. These included the woman’s 78-year-old patient (whom she cared for), a hospital staff member who had treated her, and two of the officers who had investigated the initial claim—all four were now showing similar symptoms.
Blood tests were conducted, but they turned up nothing. No contaminants were found on any of the five individuals, in the police car, at the caregiver’s home, or in the emergency room. Some suggested that the group had fallen victim to mass hysteria, a phenomenon where people 'catch' what they see and fear in others. However, this theory seemed insufficient.
While it was unsettling to witness the woman’s hallucinations, and perhaps the patient subconsciously mimicked her, it seemed unlikely that police and hospital staff—who regularly deal with disturbed individuals—would fall prey to mass hysteria. The one thing these four people had in common was that they had all touched the original patient.
The case remains unresolved.
2. The Majority of Grievers Encounter the Departed
When we lose someone close to us, most people will do anything to have a final moment with them. However, when they unexpectedly witness the deceased, the encounter is so unsettling that most opt not to mention the ghostly experience. A prevalent fear is that others may think they have lost their sanity.
It is surprisingly common for people to either see or hear a departed loved one, and there's even a term for it. Scientists refer to these experiences as post-bereavement hallucinatory experiences (PBHEs). As many as six out of ten individuals report either hearing or seeing someone they have recently lost. The visions can be strikingly real, with the deceased appearing in their favorite spots or calling out to the living person by name.
PBHEs can be either a source of comfort or distress, depending on the individual’s beliefs and stage in the grieving process. For some, it is seen as proof of life after death. However, most scientists lean towards the theory that PBHEs are related to the flashbacks experienced by those with post-traumatic stress disorder.
1. Charles Bonnet Syndrome
Few are familiar with a hallucinatory disorder called Charles Bonnet syndrome (CBS). While most people who hallucinate may hear strange voices or notice small, fleeting visual distortions, those affected by CBS endure an entirely different and harrowing experience.
The syndrome is deeply unsettling. It appears to be triggered by vision loss or impairment. Once CBS sets in, individuals begin to witness entire rooms transforming into different places, or see animals, people, buildings, enormous vehicles, monsters, giant patterns, words scrawled all over the place, and bizarre sights like spiders, water, and an overwhelming amount of plants. These visions are unnervingly silent.
Despite the terrifying nature of CBS, very few individuals speak out. The reason isn’t just the horror of the hallucinations, but the fear of being diagnosed with dementia. However, visions caused by dementia are usually accompanied by sounds. Because many sufferers remain silent about their experiences, the true prevalence of CBS remains unknown, and reliable data on the condition or its treatments is nearly nonexistent.
