The gender pain gap: what the evidence actually shows

The gender pain gap is one of the more contested claims in women's health, partly because it is often stated more strongly than the evidence supports and partly because the underlying evidence is genuinely substantial. Both things are true and it is worth being precise.

Key points

• Evidence shows recurring differences in assessment and treatment.
• Not every study finds the same effect, so precise claims matter.
• Study design should measure sex, gender and symptom context carefully.

What the research consistently finds

Analgesic prescribing differs. A systematic review found evidence of sex and gender differences in pain assessment and treatment, including analgesic administration, although findings varied between settings. [1]

Attribution differs. Research reviews describe gendered assumptions in which women's pain is more likely to be interpreted through psychological or emotional explanations. [2]

Diagnosis takes longer for conditions that mainly affect women. Endometriosis is the standard example, with delays in the UK routinely measured in years. Similar patterns appear for autoimmune conditions with diffuse early symptoms.

Patients report it themselves. In the call for evidence behind the Women's Health Strategy for England, 84% of respondents said there had been instances when healthcare professionals did not listen to them. [3]

Where it is more complicated

Good faith requires stating the limits.

Much of the literature is observational, so confounding is hard to rule out entirely. Effect sizes vary widely between settings and some studies find no difference. Some of the difference in prescribing may reflect different presenting conditions rather than different treatment of the same condition, and disentangling those requires careful matching that not every study does.

None of this overturns the overall direction. It does mean that "women's pain is ignored" is a headline, and the accurate version is that women's pain is systematically more likely to be under-treated and re-attributed, with the size of the effect depending heavily on setting.

Where it comes from

Three mechanisms are usually proposed and they are not mutually exclusive.

An evidence deficit. Pain research, including animal work, has historically used male subjects disproportionately. Mechanisms of chronic pain that differ by sex were not looked for.

Normalisation. Pain that is associated with menstruation gets absorbed into the category of expected. Patients delay presenting because they were told this is normal, and clinicians under-investigate for the same reason.

Expectation. Where a woman's pain report is expected to include an emotional component, the report is discounted rather than read.

Why it matters for research design

If your study measures pain, sex differences in reporting behaviour and in clinical response are part of the measurement environment, not a footnote. Two implications follow.

Use validated instruments rather than a single numeric rating, because a single number carries all of the reporting bias and none of the context. And recruit enough women with the condition to analyse them properly, rather than enrolling a token subgroup and pooling.

That second point is a recruitment problem, which is where most of this ends up. See the women's health data gap for the wider picture, and recruiting for women's health research for the practical side.

References

1. Riddell CA, et al. The Influence of Race and Gender on Pain Management: A Systematic Literature Review. Academic Emergency Medicine. 2016.
2. Hoffmann DE, Tarzian AJ. The girl who cried pain: a bias against women in the treatment of pain. Journal of Law, Medicine & Ethics. 2001.
3. Department of Health and Social Care. Women’s Health Strategy for England. 2022.