Phi Am, the nameless weight of the Thai night
By Ralf Ittermann · last reviewed on
Phi Am is a spirit of Thai tradition.
A weight on the chest that paralyses every sleeper.
Phi Am is Thailand’s chest-presser, a Thai nightmare spirit who settles at night on the chest of sleepers and causes paralysis, pressure and breathlessness. Unlike Mae Nak or other spirits with a fixed form, he has no image of his own: he is pure weight, pure oppression.
The term Phi Am denotes both the experience and the spirit held responsible for it, and is used by laypeople and medical staff alike for what is called sleep paralysis in Western terminology.
The spirit is sometimes linked to a lonely or betrayed death, but for the most part his origin remains as undefined as his form.
Type: Oppressive night spirit with no fixed form, a folk interpretation of sleep paralysis
Origin: Thai Buddhist-animist folk belief concerning nocturnal oppression
Texts: living oral tradition, alongside folkloric studies and popular medical education
Period: continuously alive, and at the same time a modern everyday term
Appearance: mostly an undefined, pressing form in the night
Source context
Period of the Texts
The belief is a continuously living folk tradition and, at the same time, a modern everyday term for a well-known nocturnal experience.
Area of Diffusion
All of Thailand: the belief is widespread nationwide and not confined to a single region.
Sources
Moderate: the term is present in everyday life, yet the tradition rests mainly on oral testimony rather than on systematic texts.
Name and variants
Thai: Phi means spirit, am means to press or crush: Phi Am is literally the pressing spirit. The name thus directly names the sensation attributed to it.
Nature and effect
Appearance
Phi Am has less a fixed image than a sensation: the weighing pressure on the chest in the darkness. He symbolises the nocturnal helplessness and the fear of suffocation felt by someone who cannot move.
Effect
Phi Am settles on the chest of sleepers and induces immobility and breathlessness; those affected often experience a threatening presence without being able to defend themselves. Some report bruises said to remain afterwards.
Profile: Phi Am
The key aspects of the chest-presser at a glance.
Part of Thailand’s Buddhist-animist mixed system, in which a universal bodily experience is attributed to a spirit.
Sleepers of any age, from whom he steals movement and breath at night.
No fixed image, but an undefined, pressing form, felt above all as a weight.
Paralysis, pressure and breathlessness during sleep, along with the animist explanation of a bodily state known worldwide.
Amulets, sak yant tattoos and protective formulas at the sleeping place, as well as invocations of protective deities.
One word for spirit and phenomenon alike
The name combines phi, spirit, and am, to press or crush. Today the expression Phi Am also denotes sleep paralysis itself and is used by laypeople and medical staff alike, a rare case in which folk belief and medical terminology share the same name. The background is the animist interpretation of a universal bodily phenomenon within Thailand’s Buddhist-animist system.
The spirit is sometimes linked to a lonely or betrayed death, an explanation that brings him close to other restless dead of Thai spirit belief, without his taking on their fixed form. Phi Am remains nameless in the sense that no individual fate is attributed to him: he is the oppression itself.
Comic figure and educational subject
Phi Am is a common motif in Thai comics and ghost stories. Educational pieces regularly link him to medical sleep paralysis, explaining the one through the other.
From a religious-studies perspective, Phi Am is a textbook example of how cultures assign a neurophysiological experience, sleep paralysis, to a fitting local spirit. Culturally, spirit and phenomenon have merged: the word denotes both at once, and he remains the folk-medical, animist interpretation of a bodily state whose medical explanation does not thereby disappear, but exists alongside it.
Amulets and formulas at the sleeping place
In Buddhist-animist belief, amulets and sak yant tattoos count as protection, as do holy water and protective formulas at the sleeping place. In addition, there is the invocation of protective deities, such as the ghost-frightening Thao Wessuwan, as well as incense burning against the nocturnal oppressor.
Chest-pressers worldwide and within the Thai phi cosmos
Phi Am corresponds to the Germanic-Nordic Mara, whose name lives on in the English word for nightmare, and to the Catalan Pesanta, the black being that sits on the chest. On a broader level, it belongs to the worldwide pattern of the Night Hag, which interprets sleep paralysis.
Within the Thai phi cosmos, it stands alongside considerably more tangible figures: the blood-sucking Krasue, the organ-devouring possessing spirit Phi Pop, the flying Phi Krahang and the vengeful Phi Tai Hong. Unlike these, Phi Am leaves at most bruises and the memory of a paralysing weight.
Frequently asked questions about Phi Am
Is Phi Am just another term for sleep paralysis?
Culturally, the two have merged: the word denotes both the spirit and the phenomenon, even though medicine has its own explanation for the physical state.
Where do the bruises some people report come from?
Folk belief interprets them as a trace of the weight the spirit leaves behind; medically, this is not established.
How do you protect yourself from Phi Am?
Through amulets, sak yant tattoos, blessed water and protective formulas at the sleeping place.
Further links
Further reading:
- Krasue, Phi Pop – other feared night spirits of the Thai phi cosmos
- Phi Krahang, Phi Tai Hong – the flying and the vengeful spirit of Thailand
- Pesanta – the Catalan counterpart, which also sits on the chest
- Amulet, holy water, smudging – traditional protective means
Literature (selection)
Further standard works in the bibliography.
As a Thai nightmare spirit, Phi Am remains nameless and bodiless: not a vengeful spirit with a history of its own, but the folk explanation for sleep paralysis, which can strike anyone who wakes at night unable to move.
