The part that doesn't leave a scar you can see
This is the most contested corner of the whole subject, so it needs the most careful handling. There is real evidence that a painful procedure in the newborn period can leave measurable traces. There is also a great deal of overreach built on top of that evidence. This page tries to separate the two honestly — including where the honest answer is "we don't know."
Read this before anything else on the page
Most of the research here is correlational. It can show that circumcised and intact groups differ on some measure; it usually cannot prove circumcision caused the difference, because the groups also differ in culture, religion, family background and much else.
A second thing worth saying plainly, up front: if you are circumcised, nothing on this page is a diagnosis of you. Group-level statistical tendencies say nothing certain about any individual. Plenty of circumcised men have no distress about it whatsoever. This page is about what the research shows across populations, not a claim about your inner life.
1. Newborn pain can change later pain responses
This is the best-supported finding in the area, and it comes from mainstream pediatric research, not advocacy.
In 1995, Taddio and colleagues at the Hospital for Sick Children in Toronto published a preliminary study in The Lancet suggesting circumcised boys reacted more strongly to routine vaccination months later. The authors were careful — they called their own conclusions "speculative" because the analysis was post-hoc and the sample small (42 boys).[1]
Two years later they followed it up properly, with a prospective cohort of 87 infants designed to test the question head-on. The result held: at four-to-six-month vaccination, circumcised infants showed stronger pain responses than intact infants. Crucially, the study had three groups — intact, circumcised with anesthetic cream (EMLA), and circumcised with placebo — and the effect followed a dose-response gradient: the placebo (unanesthetized) group reacted most, the EMLA group intermediate, the intact group least.[2]
Why the dose-response matters
A gradient like that is what causal effects look like. If more pain at the time predicts more reactivity later, and reducing that pain reduces the later effect, you have something considerably stronger than a bare correlation. This is the finding on this page a skeptic will find hardest to dismiss — and it also happens to be the strongest argument for pain control if a circumcision is done at all.
The mechanism proposed is neurological: the newborn nervous system is highly plastic, and an intense pain experience during that window may alter how the developing pain system calibrates itself. This is consistent with a broader literature on neonatal pain that has nothing to do with circumcision specifically.
2. Associations with stress, attachment and emotional traits
In 2020, Miani and colleagues published a study in Heliyon comparing 408 men circumcised in the first month of life with 211 intact men, using a battery of validated psychological scales.[3] The early-circumcised group reported, on average, lower attachment security, lower emotional stability, and higher perceived stress and sensation-seeking. No differences were found in empathy or trust.
That is a real, peer-reviewed finding, and it points in a coherent direction — it "resonates," in the authors' word, with the neonatal-stress literature above. But the limitations are substantial and the authors state them openly:
- It is cross-sectional — a snapshot, not a study that follows people over time. It cannot establish that circumcision came first in any causal sense.
- It relies entirely on self-reported questionnaires.
- It is a US population, where circumcised and intact men differ systematically in ways (religion, region, family culture) that could themselves explain personality differences.
- The effect sizes were small.
So: consistent with the trauma hypothesis, not proof of it. Worth knowing, not worth overstating. (One of the co-authors is the bioethicist Brian Earp, whose more careful writing on this topic is a good antidote to the louder claims made in its name.)
3. Distress in some men, later in life
Beyond the statistical studies, there is a body of clinical and self-reported material — men who report genuine grief, anger, violation, or a sense of loss on learning what was done and what it involved, sometimes decades afterward. Some describe symptoms they and their therapists frame in trauma terms.
Two honest things at once. First: these experiences are real, and they deserve to be taken seriously rather than waved away with "get over it" — which is itself one of the dismissals covered on the rhetoric section of this site. A person's distress about their own body is not refuted by a statistic about averages.
Second: self-selected reports can't tell us how common the reaction is, because the men motivated to speak up are, by definition, the ones who feel strongly. The existence of profound distress in some men is well documented. Its prevalence across all circumcised men is not known, and anyone quoting a precise percentage is likely guessing.
If this is you
If reading this stirs something up, that response is common and legitimate, and you are not broken for having it. Talking to a therapist — ideally one who won't minimize it — can help, and some men find peer communities or foreskin restoration meaningful as a way to regain a sense of agency. Others look into it and decide to let it rest. All of those are okay.
4. The bigger claims — and why we hold them at arm's length
Some advocates argue for large-scale effects: that circumcision meaningfully shapes male aggression, relationship patterns, or society-wide behavior. Ronald Goldman's Circumcision: The Hidden Trauma (1997) is the best-known book-length version of this case, drawing together clinical reports, interviews and psychological theory, and it has been endorsed by a number of named professionals.[4]
We include it because it's an influential part of the conversation and a thorough compilation of the psychological argument. But we'll be straight about what it is: a work of advocacy and synthesis from the founder of the Circumcision Resource Center, building interpretive theory on top of an evidence base that — as the sections above show — supports modest, carefully-hedged conclusions. The broad societal claims are hypotheses, not demonstrated facts, and treating them as established is the kind of overreach that lets critics dismiss the genuinely solid findings along with them.
Our position throughout this site: the strongest version of this argument is the narrowest one. "Newborn circumcision is painful, pain in newborns can have measurable after-effects, and there are gentler and more consensual options" is defensible and largely mainstream. "Circumcision explains large patterns in male behavior" is not, yet. Leading with the second undermines the first.
What can actually be said
Stripping out the overreach in both directions, here is what the evidence on this page will support:
- Newborn circumcision is painful, and the "they don't feel it / won't remember it" line is false.
- Neonatal pain can leave measurable traces in later pain responsiveness, with the dose-response data being the strongest evidence.
- There are associations between early circumcision and certain stress and attachment measures, which are suggestive but limited by study design.
- Some men experience genuine, lasting distress, which is real regardless of how common it turns out to be.
- The large societal claims are unproven, and leaning on them weakens the credible case.
None of this requires exaggeration to matter. A painful, non-consensual procedure with plausible lasting effects and no pressing medical need is enough of an argument on its own. The honest version is the strong version.
This page discusses trauma and psychological distress. It is educational and is not a substitute for care from a qualified mental-health professional. If you're struggling, reaching out to one is a good step.
Sources cited on this page
- Taddio A, Goldbach M, Ipp M, Stevens B, Koren G. "Effect of neonatal circumcision on pain response during vaccination in boys." The Lancet, 1995;345(8945):291–292. PMID 7837863. Compared pain responses at 4–6 month routine vaccination between circumcised and intact boys. After DPT vaccine, median visual-analogue pain scores were 40mm in circumcised boys versus 26mm in intact boys (p=0.03). After Hib vaccine, circumcised boys scored higher on a behavioural pain scale (8 vs 6, p=0.01) and cried longer (53 vs 19 seconds, p=0.02). Small sample (42 and 18 boys respectively); the authors concluded neonatal circumcision may alter pain response months after the event.
- Taddio A, Katz J, Ilersich AL, Koren G. "Effect of neonatal circumcision on pain response during subsequent routine vaccination." The Lancet, 1997;349(9052):599–603. DOI 10.1016/S0140-6736(96)10316-0. PMID 9057731. Prospective follow-up to [57]: a cohort of 87 infants across three groups (intact; circumcised with EMLA anaesthetic cream; circumcised with placebo). Circumcised infants showed a greater pain response at later vaccination, with a dose-response gradient — placebo group most reactive, EMLA intermediate, intact least — which is what makes the finding hard to attribute to confounding alone. The strongest single citation on the Trauma page.
- Miani A, Di Bernardo GA, Højgaard AD, Earp BD, Zak PJ, Landau AM, Hoppe J, Winterdahl M. "Neonatal male circumcision is associated with altered adult socio-affective processing." Heliyon, 2020;6(11):e05566. DOI 10.1016/j.heliyon.2020.e05566. PMID 33299934. Cross-sectional comparison of 408 early-circumcised and 211 intact US men on validated psychometric scales. Early-circumcised men reported lower attachment security, lower emotional stability, and higher perceived stress and sensation-seeking; no difference in empathy or trust. Cross-sectional, self-reported, US population, small effect sizes — associational, not causal. Authors declared no conflict of interest.
- Goldman R. Circumcision: The Hidden Trauma — How an American Cultural Practice Affects Infants and Ultimately Us All. Boston: Vanguard Publications, 1997. ISBN 0-9644895-3-8. The best-known book-length treatment of the psychological argument, by the founder of the Circumcision Resource Center; foreword by anthropologist Ashley Montagu. A work of advocacy and synthesis compiling clinical reports, interviews and psychological theory — not a controlled study. Useful as a thorough compilation of the argument; its broader societal claims are hypotheses rather than demonstrated findings.
Wording preserved from the original bibliography — verify each citation and add live links before publishing. For advocacy organizations and the strongest opposing sources, see Other Organizations.