Trichotillomania creates patchy, irregular areas of hair loss, most often on the scalp, eyebrows, and eyelashes. Unlike medical hair loss conditions that produce smooth, round bald spots, the patches from hair pulling tend to be asymmetrical, with hairs of varying lengths scattered throughout. About 1% of the population has this condition, which typically begins in adolescence and follows a waxing-and-waning pattern over years.
Where Hair Loss Appears
The scalp is the most common site, particularly the front and top of the head. Many people also pull from their eyebrows and eyelashes, which can result in thinned, sparse, or completely missing brows and lashes. Some people pull from their arms, legs, or pubic area. The pulling sites often shift over time, so you might notice hair loss moving from one area to another across weeks or months.
A hallmark of trichotillomania is that the hair loss doesn’t follow a neat, predictable pattern. Bald patches tend to have irregular borders and may appear on only one side of the head. Within a single patch, you’ll often see a mix of very short stubble, longer hairs, and completely bare spots, giving the area a rough, uneven texture that looks quite different from the smooth patches of other types of hair loss.
What the Hair Itself Looks Like
The remaining hairs in and around affected areas carry distinctive signs. Because hair is being snapped or yanked rather than falling out naturally, broken shafts at different lengths are common. You might notice coiled, twisted hairs along with split ends and fraying, which shows up in roughly 80% of cases under close examination. Some hairs appear as tiny black dots at the scalp surface where the shaft broke off right at the follicle.
This variety in hair length within a single patch is one of the clearest visual clues. Natural hair loss tends to leave behind hairs of uniform length or no hair at all. With trichotillomania, you get a patchwork: some hairs recently broken, others growing back, and others untouched, all next to each other.
How It Differs From Alopecia Areata
The condition most commonly confused with trichotillomania is alopecia areata, an autoimmune disorder. The two can look similar at first glance, but several physical differences set them apart.
- Patch shape: Alopecia areata produces smooth, round or oval bald spots. Trichotillomania creates irregular, asymmetrical patches.
- Hair at the edges: Alopecia areata often shows “exclamation mark” hairs, short hairs that taper to a narrow base at the scalp. These are absent in trichotillomania.
- Coiled and split hairs: Twisted hairs with frayed or split ends are highly suggestive of pulling and are not found in alopecia areata.
- Hair pull test: A gentle tug on hairs at the edge of a patch easily removes them in active alopecia areata but not in trichotillomania, since the remaining hairs are firmly rooted.
Both conditions can show black dots and broken hairs, which is why closer inspection matters. If you’re seeing coiled hairs with split ends and patches that don’t form clean circles, trichotillomania is the more likely explanation.
Skin Changes in Affected Areas
The scalp or skin underneath pulled areas usually looks normal at first, which is another difference from conditions that cause inflammation or scarring. Over time, though, repeated pulling from the same spot can irritate follicles, and you may notice slight redness or small bumps where hairs have been extracted. In long-standing cases, follicles can become damaged enough that regrowth slows down or hair grows back finer than before. Permanent scarring is possible with years of pulling from the same area, though this is more the exception than the rule.
Less Obvious Physical Signs
Trichotillomania doesn’t always announce itself with visible bald patches. Some people pull selectively, targeting specific textures or types of hair (coarser hairs, for instance, or gray ones). This can thin the hair overall without creating obvious bare spots, making it look more like general thinning than a distinct pattern. Others pull from areas hidden by remaining hair, so the loss may only be visible when the hair is parted or lifted.
Eyelash and eyebrow pulling can be easier to conceal with makeup but also easier to spot when no cosmetics are worn. Gaps in the lash line or eyebrows that are patchy rather than evenly sparse are characteristic signs.
Signs of Hair Ingestion
Some people with trichotillomania also chew or swallow pulled hairs, which over time can form a mass of compacted hair in the stomach called a trichobezoar. This is uncommon but worth knowing about because the physical signs are easy to mistake for other digestive problems: cramping abdominal pain, bloating, nausea, constipation, unexplained weight loss, and bad breath. In rare cases, the hair mass extends from the stomach into the small intestine, a condition called Rapunzel syndrome, which can cause bowel obstruction or more serious complications.
Behavioral Patterns You Might Notice
Beyond the hair loss itself, there are visible behavioral signs. Many people with trichotillomania pull in a ritualized way, following the same steps each time or targeting hair in specific patterns. You might notice someone repeatedly touching or stroking the same area of their scalp before pulling. Some people examine the pulled hair closely or run it between their fingers afterward.
Concealment is also part of the visible picture. Hats, headbands, scarves, strategic hairstyles, false eyelashes, and filled-in eyebrows are all common. If someone consistently covers the same area and avoids situations where the covering might come off (swimming, windy days, certain hairstyles), that pattern itself can be a sign, especially alongside any of the hair changes described above.