Fear of Knees

Genuphobia

Genuphobia is a fear of knees or of knee injury, and Wiktionary has collected three citations for it and still declines to give it an entry. The Cleveland Clinic, meanwhile, has a full page on it.

What the name actually covers

The Cleveland Clinic's page, last reviewed in March 2022, splits the presentation. Some people with genuphobia are repulsed by how knees look, including their own, are disgusted if somebody else's knee brushes against them, and are frightened of touching one or of having to kneel or cross their legs. Others fear the injury: an unreasonable fear of tearing a cruciate ligament or dislocating the joint.

Those are not the same condition. The first is an aversion to an appearance and belongs with the other body-part aversions in this catalogue. The second is a fear of a specific and common injury and belongs with traumatophobia. A single Latin root holds them together and nothing else does.

The phobias listed as commonly co-occurring follow the injury half almost entirely:

  • fear of falling
  • fear of stairs and slopes that could trip somebody
  • fear of having an accident
  • fear of any injury

Only one item belongs to the other half, and the source explains it: sexual intimacy is an occasion for seeing and touching knees.

Why the dictionary refuses an entry

Wiktionary has no entry for genuphobia and states the reason: the term does not meet the criteria for inclusion, which require durably archived evidence that people use it. It appears instead on the list of unattested phobias.

It also has a citations page with three quotations on it. Matthew Sweet uses the word in Inventing the Victorians in 2001, observing that a joke is essentially unchanged and that most American readers would find the genuphobia in it as ridiculous as English readers would. A memoir from 2017 mentions being grateful not to have it after a punishing sports injury. And in Catriona McPherson's 2020 novel Scot Free a character announces plainly that she is afraid of kneecaps, that this is genuphobia, and that she is truly sorry to have caused distress.

Three quotations and no entry is an unusual state, and it is a precise measure of the threshold. The word is used, in print, by published authors, and it has still not cleared the bar a dictionary sets for saying that a word exists.

What can be said about how common it is

Nothing specific, and the Cleveland Clinic says so plainly: it is hard to know how many people have a phobia of this kind, since many keep it to themselves or do not recognise it as one. It offers the class figure instead, that about one American adult in ten and one teenager in five will have a specific phobia at some point.

The risk factors given are the ordinary ones. Specific phobias tend to start in childhood and affect women more than men, and a family history or a genetic predisposition to anxiety raises the chance.

Why the knee attracts this fear

It is worth noting why a knee might attract this rather than an elbow. It is the joint most people are most aware of failing, it is exposed by ordinary clothing in a way most joints are not, and kneeling is a posture with a social meaning attached, which is the reading the other sources on this word reach for.

None of that is evidence. It is the shape of the object, offered because the sources have nothing else to say about why the fear settles where it does.

Told apart

Often confused with Fear of Knees

Common questions

Questions about Genuphobia

What do people with it actually fear?
Two different things. Some are repulsed by how knees look, including their own, are disgusted when somebody else's brushes against them, and dread kneeling or crossing their legs. Others fear the injury, specifically tearing a ligament or dislocating the joint. The co-occurring phobias listed alongside, of falling, of stairs and of accidents, follow the second reading almost entirely.
Why has Wiktionary no entry?
Because the term does not meet its criteria for inclusion, which require durably archived evidence of use, so it appears on the list of unattested phobias instead. It nonetheless has a citations page with three published quotations on it, which is an unusually precise picture of where the threshold sits.
Who has used the word in print?
Matthew Sweet in Inventing the Victorians in 2001, a memoirist in 2017 grateful not to have it after a sports injury, and Catriona McPherson in her 2020 novel Scot Free, in which a character says she is afraid of kneecaps, names the condition, and apologises for the distress.
Has anyone measured how many people have it?
No, and the Cleveland Clinic explains why: people keep this kind of fear to themselves or do not recognise it as one. It substitutes the class figure instead.

Added 2026-08-23 · Revised 2026-08-26