Fear of the number 13 (triskaidekaphobia)

En español: lee sobre este miedo en Fobias.org.

A fear of the number 13 can show up on calendars, hotel floors, house numbers and seat rows. It is the best-known superstition-based fear, and when it gets in the way, it can be helped.

Understanding this fear

Triskaidekaphobia is a strong fear of the number 13. Plenty of people feel a flicker of unease about it, and that is simply superstition, shared so widely that some hotels have no 13th floor and some airlines skip row 13. It becomes a problem when the fear brings real anxiety, when you go out of your way to avoid the number, or when you change plans around dates, addresses and seat numbers. Experts still debate whether it counts as a true phobia or sits closer to superstition, but for the person living with it, the dread feels real.

There are no reliable figures on how many people have a severe fear of 13, and clinical cases appear to be rare. The superstition itself goes back a long way, with old stories of an unlucky 13th guest at a meal, including Judas at the Last Supper and Loki in Norse myth. Some people fear Friday the 13th in particular, which has its own name, paraskevidekatriaphobia. For some, the fear sits alongside other lucky and unlucky beliefs, or links with a wider need to feel in control.

Common triggers

• Seeing 13 on a calendar, clock or receipt
• Friday the 13th approaching
• Being given room, seat or table number 13
• House numbers and addresses containing 13
• Totals, prices or scores that come to 13
• Thirteen people at a table or in a group
• Multiples of 13 or numbers that contain it
• Being asked to start something important on the 13th

Where it shows up

• Hotels and lifts with a 13th floor button
• Aircraft, trains and theatres with row 13
• House hunting and property listings
• Restaurants and dinner parties
• Work diaries, deadlines and booking systems
• Exam halls and seat numbers
• Wedding and event planning

Symptoms

In your body

• A sudden jolt of anxiety on seeing the number
• Racing heart and quick breathing
• Tight stomach or nausea
• Sweating or feeling hot
• Restlessness until you can change the situation
• Poor sleep before Friday the 13th

In your mind

• Something bad will happen if I do this today
• Ignoring it would be tempting fate
• If anything goes wrong it will be my fault for not avoiding it
• Uneasy until the date has passed
• Knowing it is irrational but still feeling the pull

What you might do

• Refusing room, seat or house number 13
• Moving appointments, travel or big decisions away from the 13th
• Staying at home on Friday the 13th
• Skipping 13 when numbering lists or pages
• Small rituals to cancel out bad luck
• Asking others to swap seats or tickets

What causes it

The fear of 13 grows out of a long cultural history. Twelve is a tidy, complete number, with twelve months and twelve hours on a clock face, and 13 sits just beyond it as the odd one out. Stories of a 13th guest bringing disaster, and events such as the Apollo 13 accident, have kept the reputation alive, and Friday the 13th was fixed further in people’s minds by novels and horror films. On a personal level, a phobia can take hold when something bad happens on or near the number, or when a child picks up a parent’s strong reaction, and some research links superstitious thinking with a lower sense of control, so the fear may rise at stressful times. Every time you avoid 13 and nothing bad happens, your mind credits the avoidance, which keeps the habit going.

How it can affect your life

At its mildest the fear is a quirk, but at its strongest it can affect work, travel and home life. People may turn down a good hotel room, a job start date or a house simply because of a number. Planning around the 13th of every month can be tiring, and partners or colleagues may struggle to understand. Some people feel embarrassed, which makes it harder to talk about.

Things that can help day to day

• Pin down the exact thought, such as something bad will happen, and look back at what really happened on past 13ths
• Keep a simple diary for a few months to see whether the 13th brings more bad luck than other dates
• Take small steps, such as writing 13 on a list and leaving it there, and notice the unease rise and then fade
• When the number appears, take a few slow breaths before deciding whether to change anything
• Talk it through with someone you trust, as saying the fear out loud often takes some of its power away

When to get help

It is worth getting help if the fear is shaping decisions at work or home, if Friday the 13th brings days of dread, or if you are relying on more and more rituals to feel safe. If the fear has spread to other numbers, or you feel driven to check, count or repeat things to stop something bad happening, mention it to your GP, as there may be more going on. Your GP is also the right first step for any anxiety that is affecting everyday life.

How I can help

Common questions

Is triskaidekaphobia a real phobia or just a superstition?

For most people it is a mild superstition. It is only treated as a phobia when it causes strong anxiety and gets in the way of everyday life. Experts still debate exactly where the line sits.

Why is 13 considered unlucky?

Nobody knows for sure. One idea is that 13 falls just after 12, a number linked with completeness, and many old stories feature an unlucky 13th guest at a meal. Events such as the Apollo 13 accident and horror films about Friday the 13th have kept the idea alive.

What is the fear of Friday the 13th called?

It is called paraskevidekatriaphobia, and sometimes friggatriskaidekaphobia. Some people fear only that date, while others fear the number wherever it appears.

Is it a phobia or just superstition?

Plenty of people feel a little uneasy about 13, and that is simply superstition. It becomes a phobia when the fear is strong and you rearrange your life around it.

How can you help?

I use hypnotherapy and NLP to change how your mind responds to the thing you fear, so the old alarm stops going off. Sessions are one to one over Zoom, and you get a recording of the hypnosis to listen to afterwards.

How many sessions will I need?

Many clients notice a real difference after one 90 minute session. If the fear goes back a long way, three sessions gives us room to make the change stick.

Further reading: Medical News Today: Triskaidekaphobia · Smithsonian Magazine: Why Friday the 13th is supposedly unlucky · Britannica: Friday the 13th

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