A 37-year-old woman came to us with headaches that were taking over her life. They were severe, they kept coming back, and they came with two companions that made them frightening: disturbances in her vision, and a strange pulsing quality, a rhythmic sense of something throbbing in time with her heartbeat. She had been diagnosed with migraine with aura, a reasonable first guess for a young woman with bad headaches and visual symptoms. She was given triptans and put on preventive medication, and when those did not control it, the plan was to escalate.
But two of her symptoms did not sit comfortably inside a migraine diagnosis, and they were the ones worth listening to most closely. The pulsing, rhythmic quality she described is not a typical feature of migraine. Neither were her visual symptoms behaving quite like classic migraine aura. Together they were hinting that the pressure inside her skull, rather than the migraine machinery of the brain, might be the real problem. And that distinction was not academic, because one of these diagnoses carries a clock.
If severe headaches come with visual changes and a rhythmic whooshing in the ears, and migraine treatment is not working, it is worth asking whether the pressure inside the head has actually been checked, because some causes can quietly threaten your sight.
A particular cluster of features should make anyone pause before settling on migraine, because they point toward raised pressure inside the skull:
- A rhythmic, whooshing or pulsing sound in the ears, beating in time with the heart, known as pulsatile tinnitus
- Brief greyouts or blackouts of vision lasting seconds, often when bending, straining or standing up
- Headache that is worse in the morning, when lying flat, or when coughing or straining
- Blurred or double vision that is not the marching, shimmering pattern of typical migraine aura
- Symptoms in a younger woman, often with recent weight gain, the group in whom this condition is most common
- A poor response to standard migraine treatment, despite escalation
The most important point of all is invisible to the patient. This condition produces a visible swelling at the back of the eye, and finding it takes only a brief examination.
What the first opinion concluded
Her first assessment came from neurology, which diagnosed migraine and moved to escalate treatment with a CGRP antibody, one of the modern, highly effective migraine therapies.
For genuine migraine that is not responding, stepping up to a CGRP antibody is excellent, evidence-based care. The treatment itself was not the problem.
The problem was what got skipped on the way there. Before reaching for a sophisticated migraine drug, the simplest and most revealing step had not been taken: looking at the back of her eyes. Escalating the therapy answered the question "how do we treat this migraine more aggressively" while leaving the more important question, "is this actually a migraine at all," unasked. And in her case, the unasked question was the one with a deadline attached, because raised pressure left untreated steadily damages the optic nerve, and that damage becomes permanent.
The second opinion
She was referred to a neurology tertiary centre for a medical second opinion, and the decisive moves were strikingly basic. They performed a fundoscopy, simply examining the optic discs at the back of each eye. On both sides they found papilledema, the tell-tale swelling caused by raised pressure pushing on the optic nerves. To confirm it, they measured the pressure of the cerebrospinal fluid directly, and it was elevated.
The diagnosis was idiopathic intracranial hypertension, or IIH, a condition in which the pressure of the fluid around the brain rises without a tumour or other obvious cause. It explained everything she had: the headaches worse with pressure changes, the visual obscurations, and the pulsatile sound in her ears. It had never been a migraine.
The treatment was a medication called acetazolamide, which reduces the production of that fluid and brings the pressure down. Within six weeks she was free of symptoms. More importantly, because she had been caught in time, the threatened damage to her optic nerves was prevented. Her sight was saved by an examination that takes a couple of minutes and a diagnosis made before the window closed.
Why this case matters
The lesson here carries an urgency the body usually does not give us.
Not every headache is a migraine, and with this particular condition the time available to prevent permanent vision loss is limited. A diagnosis that is escalated rather than questioned can let that window quietly close.
Most lessons in medicine forgive a delay. This one does not, which is exactly why the simple examination matters so much. Reaching for an advanced treatment can feel like thoroughness, but it is no substitute for confirming the diagnosis first, especially when a two-minute look at the eye can reveal a sight-threatening cause. Clear communication in healthcare means a patient with red-flag features being told what is being ruled out and what is not, rather than being moved straight up the treatment ladder for a disease nobody had truly confirmed.
A word of balance
This is not a claim that migraine is overdiagnosed, because it is genuinely common and often severe, and the modern treatments for it are a real advance. IIH is far less common, and most headaches are not caused by it. The narrow, practical point is about the red flags: when a headache comes with pulsatile tinnitus, visual obscurations or a pressure-related pattern, and especially when treatment is failing, the back of the eye should be examined before the migraine label is accepted, because the cost of missing this one is measured in eyesight and in time.
A medical second opinion is especially worth seeking when:
- Severe headaches come with a rhythmic whooshing in the ears or brief blackouts of vision
- Your headache is worse lying down, in the morning, or when straining, and migraine treatment is not helping
- No one has examined the back of your eyes or checked the pressure inside your head
- You have any new or worsening visual symptoms, which should always be taken seriously and promptly
Which leaves the question this case makes urgent: when a treatment is being escalated, has anyone paused to confirm the diagnosis with the simple exam that could change everything, before the time to act runs out?
This is precisely the kind of case CW1 exists for, helping patients secure a timely medical second opinion when a treatment is failing, and supporting the communication in healthcare that ensures red-flag symptoms are examined rather than escalated past.
Note: this is one case rather than medical advice. New or changing visual symptoms with headache deserve prompt attention, and the right next step is a careful conversation with a neurologist or ophthalmologist.