An Itchy Thumb
An itching or "pricking" thumb is traditionally read as a warning that trouble, an unwelcome visitor, or something "wicked" is approaching — a belief given unusually solid literary weight by Shakespeare's witches in Macbeth, and worth keeping distinct from the site's itchy-palm pages, which concern money rather than warning.
Traceable origin
Earliest known record: William Shakespeare, Macbeth, Act 4, Scene 1 ("By the pricking of my thumbs, / Something wicked this way comes"), circa 1606
This is one of the most concretely traceable entries on the entire site: the exact line, the exact author, and an approximate date are all firmly established, since Macbeth's witches speak the line directly and it has been continuously in print and performance ever since. What's less certain is whether Shakespeare invented the specific thumb-pricking-as-warning association himself or was drawing on an existing folk belief already circulating in early modern England — Shakespeare frequently versified existing folklore rather than inventing beliefs from nothing, so the honest answer is that the line is definitely the belief's most famous and earliest solid attestation, even if it may not be its true point of origin.
A folk belief with an unusually solid literary attestation
Most beliefs on this site can be traced to a general period or a documented folklore collection at best; this one has an exact line, from an exact play, by an identifiable author, with a rough date attached. That's genuinely rare, and it's worth appreciating on its own terms — Macbeth's Second Witch delivers the line just before Macbeth himself arrives, using the thumb-pricking sensation as the witches' own early-warning signal that someone significant, and dangerous, is approaching.
Did Shakespeare invent the belief, or record one?
It's honest to flag genuine uncertainty here: Shakespeare was well known for weaving existing English folk beliefs and superstitions into his plays rather than inventing them from nothing, which makes it plausible that some version of an itching-thumb-as-warning belief already circulated in early modern England before Macbeth gave it its most famous and enduring phrasing. Without an earlier surviving source making the same specific claim, though, this can't be stated as certain — the honest position is that Macbeth is definitely the belief's earliest solid attestation, while remaining agnostic about whether it's also the belief's true point of origin.
A warning sign, not a money sign
This sign shouldn't get folded into the site's itchy-palm pages, which concern money specifically. An itchy thumb carries a warning valence — trouble, an unwelcome arrival, something "wicked" — rather than a financial one, and conflating the two loses exactly what makes each finger-and-hand sign distinct in the broader body-signs folklore this site covers.
The phrase outlived the specific belief
"Something wicked this way comes" has become a stock cultural phrase used to signal approaching trouble in general contexts (including as the title of a well-known Ray Bradbury novel), largely detached from the specific bodily-omen belief it originally described — a good example of folklore surviving as language even after the underlying superstition itself has faded from everyday practice.
Why a Shakespearean line became lasting folklore rather than just poetry
Part of what likely helped this specific line endure as genuine folk belief, rather than remaining purely literary, is how vivid and physically concrete it is — a real bodily sensation (a prickling thumb) paired with an ominous, memorable warning, which gives it the same kind of tactile, self-testable quality that keeps a lot of body-sign superstitions alive across generations, independent of whether anyone involved has actually read or seen the play it comes from.
What Different Cultures Say
American folk tradition absorbed the phrase largely through its enormous cultural reach as a quoted line from Macbeth rather than through independent folk transmission, and "something wicked this way comes" has become widely recognized as a stock phrase for approaching trouble even among people unfamiliar with the specific thumb-itching belief it originally described.
British and Irish folk tradition treats an itching or pricking thumb as a more general warning sign of approaching trouble or an unwelcome visitor, predating and existing somewhat independently of Shakespeare's specific literary version, which suggests the play may have crystallized and popularized an already-circulating folk belief rather than inventing it outright.
Frequently Asked Questions
Is "pricking" the same sensation as an ordinary itch?+
Most modern retellings of the belief treat pricking and itching as interchangeable for practical purposes, though the original Shakespearean phrasing specifically uses "pricking," a slightly sharper, more pointed sensation than a general itch.
Does the belief specify which thumb, or does it apply to either?+
Unlike several of the site's hand-and-finger beliefs, the itchy-thumb warning doesn't carry a widely documented left/right distinction — it's generally treated as applying to either thumb without a specific side-based rule.
Is there a remedy for an itchy thumb, the way there is for other bad-luck signs?+
No widely recorded remedy accompanies this belief the way, for instance, spilled salt has its own fix — the itchy thumb functions purely as a warning to be alert rather than as a bad-luck event requiring an active counter-ritual.
Did Macbeth's witches invent other body-sign beliefs that are still repeated today?+
The pricking-thumbs line is by far the most famous and directly quoted body-sign belief from the play, though Macbeth as a whole is closely associated with numerous other theatrical superstitions unrelated to body signs specifically.