Conditions

Four conditions that share a pattern: common enough to be expected in general practice, distinctive enough to be recognised, and yet routinely mistaken for something else for years at a time.

Why these four

They are grouped here because the failure mode is the same in each case. A symptom appears, it is attributed to the most familiar explanation, treatment for that explanation is given, it does not work, and the cycle repeats. Meanwhile the actual condition continues, and in two of the four cases untreated disease causes lasting change.

The pattern of delayed diagnosis

Endometriosis is the clearest example. Painful periods are extremely common, most are not endometriosis, and the result is that severe period pain is often normalised for years. The distinguishing features are not subtle once they are asked about: pain that stops a person functioning, pain that starts before bleeding, pain with sex felt deep inside, pain opening the bowels during a period, and difficulty conceiving. A person who describes that combination clearly is much more likely to be investigated than one who says their periods are bad.

Lichen sclerosus follows a different route to the same place. Itching is assumed to be thrush, antifungal treatment is used repeatedly, and the diagnosis is often only made when the skin has already changed shape. That matters because architectural change is not reversible, whereas the itching and the progression are both controllable with treatment.

Vulvodynia is missed for the opposite reason. There is nothing to see, and an examination that looks normal is often taken to mean that nothing is wrong. Persistent vulval pain without a visible cause is a recognised condition with recognised treatments.

Thrush and bacterial vaginosis are the everyday version of the same problem. They feel superficially similar to the person experiencing them, they are treated with completely different medicines, and studies of self diagnosis consistently find it is inaccurate more often than not.

What a proper assessment includes

For vulval symptoms, that means someone looking. An examination of the vulva with adequate light, comparing both sides, checking the skin at the back of the vaginal opening and around the clitoris, and noting any colour or texture change or any loss of normal structure. Swabs where infection is possible. A biopsy where the appearance is unclear or where treatment has not worked as expected.

For pelvic pain, it means a history that covers the cycle, the bowel, the bladder and sex, an abdominal and vaginal examination, and imaging where deep disease is suspected, with the important caveat that a normal scan does not exclude endometriosis.

Asking directly for an examination is reasonable. Symptoms in this area are frequently managed over the telephone, and while that is convenient, it cannot identify a skin condition.

Language that helps at an appointment

Describing duration, pattern and location gets further than describing severity alone. Useful phrases include where exactly the symptom is, whether it is constant or provoked by touch, whether it is worse at particular points in the cycle, what has already been tried and for how long, and what effect it has on daily life. Bringing a written note is not excessive; ten minute appointments reward preparation.

When a treatment does not work

The single most useful rule in this section: if a treatment has been tried properly and has not worked, the diagnosis should be revisited rather than the treatment repeated. Two failed courses of antifungal treatment is a reason for an examination, not a third course.

Last reviewed: September 2026