Having strange little people in your home is, well, a pretty unusual situation – especially if they resemble tiny, elf-like creatures bouncing around, climbing walls, or crawling on the floor. But don’t panic! If you’ve eaten a particular kind of mushroom recently, your mind is still intact; it’s the mushroom that’s causing the spectacle.
These peculiar visions are clinically referred to as Lilliputian hallucinations, named after the tiny residents of the fictional island in Jonathan Swift’s novel Gulliver’s Travels. Various conditions, like schizophrenia and alcohol withdrawal, can also result in such hallucinations, but none do so as reliably as the infamous Lanmaoa asiatica when it’s eaten raw or undercooked. This mushroom, recognized for its reddish color, only received its formal classification in 2015.
Known for its rich umami flavor, L. asiatica is quite popular in Yunnan Province, China, showing up at local markets and restaurant menus. Yet, there’s a vital caution: don’t dig in until the 15-minute countdown is up, a common precaution among vendors. If you disregard this advice, you might just “see little people,” as shared by Colin Domnauer, a biology doctoral researcher.
History
Although this mushroom is closely associated with Yunnan, where locals call it ‘Jian shou qing‘ and refer to the little entities it conjures as ‘xiao ren ren‘, its occurrences extend to other locales. In the Philippines’ Cordillera Administrative Region, people know it as ‘Sedesdem‘ and the elf-like beings as ‘ansisit‘. A DNA test done by Domnauer in 2024 confirmed that despite their visual differences, these mushrooms belong to the same species.
Interestingly, reports of a wild mushroom leading to visions of tiny creatures have been traced back to Papua New Guinea since the 1930s. Missionaries in the Western Highlands encountered local communities consuming a wild mushroom they called ‘nonda‘. This often resulted in them appearing temporarily insane, a phenomenon dubbed ‘mushroom madness,’ where Lilliputian hallucinations were notably present.
In the 1960s, American author Gordon Wasson and French botanist Roger Heim set out to investigate this mushroom’s effect in Papua New Guinea. They collected samples which were then sent to Albert Hofmann, the Swiss chemist known for his work with LSD, but he found nothing different. Unfortunately, research didn’t progress further at that time.
Fast forward to December 2025: Domnauer’s supervisor traveled to Papua New Guinea searching for the same mushrooms but came up empty-handed. “It could be the same species, which would be quite surprising since Papua New Guinea doesn’t typically share species found in China and the Philippines,” Domnauer commented.
If it turns out to be a different species, it would add an intriguing layer to the mystery from an evolutionary standpoint. It would suggest that similar bizarre effects emerged independently in distinct mushroom species across different regions.
This enigma could even stretch back further—Donmauer points out that an ancient Daoist text from the 3rd century CE notes a ‘flesh spirit mushroom’ which, when consumed raw, enables one to “see a little person” and supposedly achieve transcendence.
Symptoms
Research conducted at the Dentinger Lab at the Natural History Museum of Utah has shown that L. asiatica lacks the gene clusters responsible for two well-known hallucinogenic fungi – psilocybin from ‘magic mushrooms’ and ibotenic acid from the fly agaric. This means the cause of the Lilliputian hallucinations is unlike any other known psychoactive substance and operates through mechanisms yet to be understood by science.
Donmauer expressed enthusiasm about the opportunity to discover an unknown psychoactive compound, describing it as a thrilling frontier for expanding our understanding of the mind. The appearances of tiny creatures aren’t the only odd effects linked to this mushroom. The hallucinatory episodes can last an unusually long time, from one to three days, with effects starting 12 to 24 hours after consumption. In severe cases, hospital visits are required due to side effects like delirium and dizziness, leading to hundreds of cases treated annually in Yunnan Province.
Generally, most known psychedelic substances cause varied perceptions, differing person-to-person and experience-to-experience. However, not L. asiatica, with the little people hallucinations consistently reported across various users. “I haven’t come across anything else that induces such uniform hallucinations,” Donmauer noted.
Ongoing studies into L. asiatica are poised to reveal not just its hallucinogenic attributes, but also broader queries related to consciousness and the relationship between mind and reality. Additionally, it could shed light on the reasons behind spontaneous Lilliputian hallucinations in contexts beyond ingesting the mysterious fungus.
