Morgellons Without Skin Lesions: Is There Enough Evidence to Validate a Subgroup?

For people who report fibers or crawling sensations but have no visible sores, a basic question is whether Morgellons can occur without skin lesions. The question asks two different things: have people without lesions received the label, and has research established a reproducibly identifiable subgroup meeting the proposed definitions’ required finding—a clinician-observed embedded or projecting filament? This review refers to that as “the proposed subgroup.”

The distinction matters. A published diagnosis shows how an author classified a patient; the second claim requires a documented skin examination and the qualifying finding in the same patient.

No reviewed report combines a documented lesion-free skin examination with a clinician-observed embedded filament. Each candidate case misses on a different element:

• Savely and Stricker’s six patients had qualifying fibers but undocumented lesion status.^[5]
• Ranka’s patient had a documented lesion-free examination, but no tissue filaments were documented.^[7]
• Ghiam’s patient reported no skin lesions, but no whole-body skin examination or tissue filaments were documented.^[8]
• Ohn’s patient had a fiber observed in an intact-skin biopsy, but had lesions elsewhere, and the fiber was never analyzed.^[12]

The reviewed literature therefore does not yet establish the proposed subgroup. The gap does not show that lesions are required at every examination, nor does it justify assuming a psychiatric cause.

Scope and methods: This is a focused narrative review, not a systematic review or a prevalence estimate. Sources were identified from the author’s familiarity with the Morgellons literature, supplemented by AI-assisted searching and citation tracing; no formal database search protocol or predefined inclusion rule was used. Cited passages, methods, tables and case descriptions were checked against full-text copies of the original publications. No new patient examinations, laboratory analyses or independent assessments of the published images were performed.

First, define what “without skin lesions” means

An open sore is only one kind of skin lesion. Papules, plaques, calluses and color changes can exist beneath an intact surface. In the International League of Dermatological Societies glossary, an erosion involves loss of epidermis, while an ulcer extends into the dermis. Neither term encompasses every abnormality of the skin.^[1]

For this review, lesion-free means no clinician-documented visible or palpable skin lesions at the examination under discussion. A filament requiring magnification is assessed separately from visible or palpable lesions: Middelveen 2018 specifies at least 50×,^[13] while Savely and Mayne use 60×.^[5][9] A filament visible without magnification counts as a visible finding here. This is an operational choice, not a diagnostic criterion.

The literature uses both “fiber” and “filament.” This review keeps each source’s own term and uses “filament” for the proposed definitions’ required finding.

People whose lesions have healed could constitute a currently lesion-free phase. People who have never developed lesions would represent a different proposed presentation. A useful study would distinguish these groups rather than combine them.

The claim appears in the early literature

Savely, Leitao and Stricker’s 2006 opinion paper describes some patients as having intact skin without observable lesions, with sensations and fibrous or granular material as the apparent indicators. It does not provide a denominator or individual case descriptions for that subgroup.^[2]

The paper also suggests that relatives with similar systemic symptoms but no skin symptoms might share the illness. This is a hypothesis about clinical similarity, not a demonstrated diagnosis in those relatives. Nonspecific symptoms shared by family members cannot, on their own, establish a shared disease.^[2]

Savely and Stricker’s 2007 perspective repeats both ideas and cites the 2006 paper. It shows that the lesion-free possibility was part of the early discussion, but it does not add a separately characterized lesion-free cohort.^[3]

Early investigators did not use a uniform definition. Harvey and colleagues’ 2009 series required at least two chronic, unhealed lesions documented by a clinician regardless of suspected excoriation. Approximately 70% of its 25 patients regularly developed painful shallow ulcers, while filaments were identified on examination in fewer than a third.^[4] The remaining patients were not lesion-free: lesions were required for inclusion.

That selection rule limits the opposite argument too. Finding lesions in a population selected for lesions cannot establish that lesions are universally necessary.

What the larger studies actually count

Savely and Stricker: six patients whose lesion status needs clarification

The 2010 study included 122 patients selected because the first author reported observing microscopic subcutaneous fibers using a 60× handheld magnifier. Eligibility did not require open sores. The first author made the qualifying fiber observation, without reported independent confirmation, and later extracted symptoms retrospectively from de-identified chart questionnaires.^[5]

Table 6 records 116 patients (95%) with spontaneously appearing, slow-healing skin lesions. The data extraction tool scored a symptom as present only when the patient had checked it on the clinic questionnaire; a blank item was scored the same as an absent one. The remaining six patients therefore did not check a lesion item. That is not a recorded absence, as the authors’ own reasoning about fibers illustrates: only 77% of a cohort selected for fibers reported fibers, which the authors attribute to underreporting. The study also does not record whether each patient’s qualifying fiber was observed in a lesion or in intact skin.^[5]

Pearson: a zero-lesion examination is present in the data

What was counted

Pearson and colleagues’ 2012 study clinically examined 41 participants. Their documented lesion counts ranged from zero to 59, with a median of 17. At least one participant therefore had no lesions recorded at that examination. The paper does not identify how many had zero or establish their lifetime lesion history.^[6]

Its case definition required reported material emerging from skin together with either lesions or disturbing skin sensations. Clinician-confirmed embedded filaments were not required. The zero-lesion finding therefore belongs to a broader population than a filament-defined subgroup.^[6]

Of the 70 survey respondents, 73% reported material emerging from unbroken skin. This described particular sites, not necessarily lesion-free bodies.^[6]

What the biopsies show

Pearson classified any skin area that looked abnormal, or felt abnormal while looking normal, as an abnormal area; clinically normal sites were normal in both appearance and sensation. The 22 biopsies from those clinically normal sites were essentially normal histologically, which the authors interpreted as evidence against systemic or subclinical skin abnormalities. Five contained cellulose fibers at or adjacent to the specimen edge, without tissue reaction. The 22 biopsies were specimens, not 22 lesion-free people. Normal-looking skin with abnormal sensation fell under the abnormal-area category, and the paper does not report how many biopsies came from such sites.^[6]

Of 23 material samples from intact skin sites in 12 patients, most were reported as protein, likely superficial skin, or cellulose consistent with cotton. Among the 41 examined patients, 31 had lesions amenable to biopsy or material collectible on skin; the other ten were not necessarily lesion-free.^[6]

Objections and the scratching question

The filament-centered literature raises two objections. Middelveen 2018 notes that Pearson’s entry definition did not require embedded or projecting filaments.^[13] Mayne and colleagues argue that Pearson’s investigators searched for filaments with a dermoscope, at a magnification too low to identify the filaments they describe; Pearson’s methods mention a dermatoscope for documenting biopsy sites and describe no higher-magnification skin survey.^[6][9] Both are legitimate limits: normal biopsies in Pearson’s broadly defined population do not directly test a filament-defined disease. Conversely, the proposed definition alone does not show that filaments occur in a documented lesion-free patient.

Pearson’s dermatologists favored excoriation or chronic irritation; Harvey counted lesions regardless of whether excoriation was suspected.^[4][6] The filament-centered account also gives scratching a role: Mayne and colleagues propose that lesions result from mechanical stress, internally from filaments and externally from scratching.^[9] If lesions are largely secondary to scratching, lesional versus lesion-free status could vary with scratching intensity, treatment or time. The competing filament-camp interpretation is that the disease process itself contributes to lesions. These alternatives need examination and follow-up, not an assumption about cause.

Case reports without lesions: what do they establish?

Ranka and colleagues’ 2016 letter describes a 50-year-old woman reporting fibers emerging from her skin. On thorough examination, the authors found no lesions anywhere on her body, including excoriations. She brought the material in a folded piece of paper. From its appearance under light microscopy, the authors concluded that the fibers came from a broomstick, and on that basis made a provisional Morgellons diagnosis. They placed the case within psychodermatology, reported a psychiatric evaluation and treated her with antipsychotics.^[7]

This is a direct example of the label being applied to a patient without lesions. It does not document filaments produced within intact skin. The broomstick identification also rests on microscopic appearance alone, the same limitation that applies when appearance is used to argue for an endogenous origin. Use of the label is demonstrated; a lesion-free filament-producing dermopathy is not.

Ghiam and colleagues’ 2024 report describes a 63-year-old man reporting material emerging from the conjunctival fornices of both eyes. Review of systems was negative for dermatologic lesions, and repeated ophthalmic examinations, including lid eversion, found no lesions or foreign bodies. The authors interpreted the presentation as a delusional disorder.^[8]

This adds another published use of Morgellons without demonstrable lesions. However, eye examinations and a review of systems do not constitute a documented whole-body skin examination—which the authors’ own introduction says may be needed to distinguish primary lesions from excoriations—and the report does not establish tissue-produced filaments.^[8]

A label shared across reports cannot resolve these differences in what was observed or how the diagnosis was made. Nor does the absence of visible lesions, by itself, establish a psychiatric cause.

Proposed definitions and the proposed sequence

Do symptoms come before lesions?

Mayne and colleagues’ 2013 opinion article states that early presentations may show no visible dermopathy and that pruritus can be the leading symptom with no skin change evident. It defines Morgellons by filaments seen at 60× or more in or protruding from skin lesions, or under unbroken skin, and calls high-power magnification essential when searching beneath unbroken skin.^[9]

That is a rationale for investigation, not a documented progression in a defined lesion-free group. Two of four referees did not approve version 1, one approved, and one approved with reservations.^[9]

Pearson found 57% of survey respondents recalled skin sensations first and 16% recalled lesions first.^[6] Harvey’s data summary reports that itching of unbroken skin appeared to precede other skin symptoms.^[4] Both are retrospective reports; Harvey’s series required lesions for entry. Middelveen 2018 instead describes unpublished observations of lesions beginning as folliculitis and becoming ulcerative.^[13] Folliculitis is itself a lesion, putting that proposed early stage in tension with Mayne’s proposed early presentation without visible dermopathy.^[9] Neither proposal is a documented prospective sequence.

How the definitions changed

Middelveen 2018 describes spontaneously appearing ulcerative lesions containing filaments as distinguishing and proposes a case definition mentioning filamentous, ulcerative skin lesions while calling filaments the key criterion.^[13] Whether ulcers are required in this formulation is ambiguous.

Middelveen and colleagues’ 2020 proposed criteria make embedded or projecting multicolored filaments the only mandatory feature and list calluses, ulcerative lesions and papules among optional secondary features; their refined case definition does not mention lesions.^[10] Yet the same paper’s introduction describes Morgellons as a condition in which lesions containing filaments spontaneously arise, and its 16-person study required spontaneously developing lesions with embedded or projecting filaments for entry, along with lesions suitable for histological sectioning. Specimens were taken from lesions, mostly as callus material.^[10]

The study therefore cannot characterize a lesion-free group: lesions were required for inclusion. Table 2 describes calluses, vesicles, papules, scaling and ulceration across the cases, and some entries mention calluses or papules without ulcers. That distinguishes non-ulcerative lesions from open sores, but every entry describes visible skin changes.^[10]

The authors state that their staging tracks lesion severity and corresponding histological findings rather than sequential progression through clinical stages. Its mild stage is therefore not a demonstrated pre-lesion phase.^[10]

CEHF’s current diagnostic page similarly identifies unusual filaments beneath unbroken skin or projecting from skin as the key criterion,^[11] so that written criterion cannot be characterized as itching or crawling alone. An organization’s diagnostic position is also distinct from data validating that position in a particular subgroup. CEHF’s position is not independent of the research group discussed here: as of 2013, several of Mayne’s coauthors, including Middelveen and Stricker, disclosed uncompensated service on CEHF advisory panels.^[9]

An intact biopsy site is not a lesion-free patient

Ohn and colleagues’ 2017 case illustrates the problem. The patient had erythematous patches and erosions on the arms, hands and chin, while the biopsy was taken from intact forearm skin; histology showed mild superficial perivascular lymphocytic infiltration and was otherwise described as normal. On gross examination, the authors observed a single fiber extruding from the dermal side of the specimen; it was not analyzed and was not identifiable after tissue processing.^[12]

The 2018 Middelveen review cites Ohn’s report (its reference 75) among case studies in which the skin was described as completely normal, and argues that patients in those reports were unlikely to have Morgellons because they lacked its diagnostic finding.^[13] The same review later lists Ohn among only three case studies that specifically mention fibers in or projecting from skin, and its Table 1 records a fiber on the dermal side of the biopsy. These passages are inconsistent about whether the patient had the review’s diagnostic finding. Neither placement establishes a lesion-free examination; the documented examination above showed lesions.^[12][13]

Here the filament-centered review excludes purported normal-skin cases from Morgellons; it does not offer them as a lesion-free subgroup. The biopsy site, tissue findings and overall skin examination need separate reporting.

How far does the evidence take us?

The assessment below concerns the strength of the classification claim. It is not a formal evidence-grading exercise or a clinical diagnostic rule.

These conclusions do not assume that patients with lesions constitute one proven disease. The narrower question tests the proposed definitions’ required finding in a documented lesion-free examination.

Repetition across opinion papers, reviews and organizational pages should not be counted as repeated recruitment of independent patients. The relevant evidence is the documented person, examination and specimen, with enough detail to identify what was actually absent and what was present instead.

What would establish the subgroup more convincingly?

A well-documented case could establish that a particular presentation occurs. Estimating its frequency, showing reproducibility and validating a diagnostic classification require more. A useful investigation would report:

1. A defined population and denominator. Recruitment criteria should permit both lesional and lesion-free presentations, with a clear explanation of how cases were identified.
2. A documented skin examination and history. Record all lesion types, not just ulcers. Separate never-lesional patients from those whose previous lesions healed, including treatment history.
3. The finding that qualifies the patient for inclusion. Distinguish symptoms and patient-supplied material from clinician-observed structures. If endogenous production is claimed, document material identity, anatomical location and evidence of origin rather than relying on appearance alone.
4. Appropriate comparisons and independent assessment. Apply the same examination and collection methods to suitable comparison groups, including other itchy skin conditions and apparently healthy skin, to assess how specific the proposed finding is.
5. Follow-up. Determine whether patients remain lesion-free, develop lesions, recover, or receive another explanation for their symptoms.

The assessment standard should match the claim. A description of symptoms needs accurate clinical reporting. A claim of a distinctive filament-producing disorder requires evidence that distinguishes it from other explanations. A proposed infectious cause introduces an additional question that the absence or presence of sores cannot settle.

Conclusion

The reviewed evidence shows use of the Morgellons label for people reporting no lesions and shows that intact skin can coexist with abnormalities elsewhere. No reviewed report combines a documented lesion-free skin examination with a clinician-observed embedded filament: Savely and Stricker’s six had qualifying fibers but undocumented lesion status, while Ranka and Ghiam reported absent lesions without tissue filaments.^[5][7][8] In Ohn’s case, a fiber was seen in an intact-skin biopsy, but the patient had lesions elsewhere and the fiber could not be identified after processing.^[12]

The proposed subgroup remains insufficiently characterized. This uncertainty is neither proof that all presentations share a cause nor grounds for excluding someone simply because no lesions are visible today.

The next useful evidence is a patient-level account: what examination established the absence of lesions, what objective finding supported classification, whether lesions had occurred previously, and what happened on follow-up.