Migraine With Aura:
Why You May See Zigzag Lines
Before a Headache
May 21, 2026 • The Headache Lab • 7 min read
Quick Answer
Migraine with aura is a neurological condition that can cause temporary visual symptoms like zigzag lines, flashing lights, blind spots, or tingling before a headache begins. Aura symptoms usually develop gradually over several minutes and often resolve within an hour before the migraine phase starts.
What’s Actually Happening During an Aura?
There is a clear neurological reason that an aura occurs.
Before a migraine starts, a wave of electrical activity moves across the brain’s surface, followed by a period when activity slows down. This process, called cortical spreading depression, temporarily interferes with normal brain signals and causes the sensory symptoms of aura.
Aura usually lasts between 5 and 60 minutes and goes away on its own. After that, the headache phase begins. About 25 to 30 percent of people with migraine experience aura at some point.
What Does Aura Feel Like?
Aura can look different for each person, but there are some common patterns to know.
Visual aura is the most common type. People often describe:
- Blinking or shimmering at the edge of their vision
- Zigzag or arc-shaped patterns (sometimes called a “fortification spectrum”)
- A blind spot or area of blurred vision
- Tunnel vision or partial loss of sight in one eye
Aura can also cause symptoms besides vision changes, such as:
- Sensory changes: tingling or numbness that often starts in the hand and moves up the arm toward the face
- Language difficulty: trouble finding words or speaking clearly
- Motor weakness: heaviness or weakness on one side of the body (less common, and worth discussing with a provider)
How Is It Diagnosed?
There is no blood test or brain scan that can diagnose migraine with aura. Instead, diagnosis is based on your history: the pattern, frequency, duration, and type of your symptoms over time.
Important factors:
- How often episodes occur and how long they last
- What your aura symptoms look like
- How long between aura and headache onset
- Frequency of symptoms
- Family history
Sometimes, imaging like an MRI is ordered, especially if aura symptoms are new, last a long time, or involve weakness. This helps rule out other causes.
At The Headache Lab, getting a thorough history is our top priority. Getting the diagnosis right is the first step to effective care.
Migraine With Aura vs. Without:
How to Tell the Difference
Both types involve the same main migraine symptoms: moderate to severe head pain, sensitivity to light and sound, and often nausea. The difference is whether neurological symptoms come before the headache.
Some people have aura without any headache, which is called a silent migraine. The visual or sensory symptoms happen, but no headache follows. This can feel unsettling the first time, especially if you don’t know what it is.
What Sets Off a Migraine With Aura?
Triggers for migraine with aura are often the same as for other migraines, though they can vary from person to person. The most common ones include:
- Sleep disruption: both too little and too much
- Hormone changes: especially around menstruation, perimenopause, or changes in contraception
- Stress: and the let-down period after stress
- Skipping meals or dehydration
- Sensory overload: bright lights, strong smells, loud environments
- Weather changes: shifts in barometric pressure
Keeping track of symptoms in a headache diary can help identify patterns. Including sleep, food, and stress can help you identify your triggers, which differ from person to person. It’s a simple but extremely helpful tool.
Treatments That Really Help
Managing migraine with aura usually involves having a plan for when an episode starts and a long-term strategy to reduce how often they occur.
When a Migraine Is Coming On
Triggers for migraine with aura are often the same as for other migraines, though they can vary from person to person. The most common ones include:
- CGRP inhibitors taken at the onset of aura or other symptoms are very effective in preventing progression to the migraine phase.
- Triptans are another acute option. They work best when taken early in the headache phase, not during the aura.
- NSAIDs and combination pain relievers can help with milder episodes.
- Anti-nausea medicines are often used along with pain relief.
Preventing Episodes From Happening
For people who have frequent or severe migraines, preventive therapy may be helpful:
- CGRP inhibitors, given as daily tablets or monthly/quarterly injections, have strong evidence and have helped many of our patients.
- Botulinum toxin injections are recommended for chronic migraine, which means 15 or more headache days each month.
The Lifestyle Side of Things
It may not sound exciting, but getting enough sleep, eating regular meals, drinking plenty of water, and building good stress-management habits really help many people.
A Few Questions We Hear Often
Is migraine with aura dangerous?
For most people, it is not. However, there is a slightly higher risk of stroke, especially in women who smoke or use estrogen-containing birth control. Your provider can help you determine your risk level.
Can aura happen without a headache?
Yes, silent migraine is real. If you have sudden visual or neurological symptoms, get checked to rule out other causes.
Can aura happen without a headache?
Yes, silent migraine is real. If you have sudden visual or neurological symptoms, get checked to rule out other causes.
Is Aura different from a TIA (mini-stroke)?
Both can involve sudden visual or sensory symptoms. The key difference is onset: aura builds slowly over several minutes, while TIA symptoms tend to appear abruptly. When in doubt, especially with new or unusual symptoms, seek emergency evaluation.
Will my migraines get worse over time?
Not always. Migraine patterns can change as you get older. With good management, many people are able to reduce how often and how severe their migraines are.
You Don’t Have to Manage This Alone
Migraine with aura is a well-understood neurological condition. It has a name, a clear explanation, and, most importantly, effective treatment options.
If you are in the Westmont area or anywhere in the western suburbs of Chicago and migraines are affecting your quality of life, we encourage you to come in for an evaluation. Many patients come to us after years of handling symptoms on their own or being told there is not much that can be done. That is rarely the case.
At The Headache Lab, we take the time to understand your whole situation and create a plan that is customized to you, not just a standard approach. Migraine care that works is personal.
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Migraine With Aura: Why You May See Zigzag Lines Before a Headache
May 21, 2026 • The Headache Lab • 7 min read
What’s Actually Happening During
an Aura?
There is a clear neurological reason that an aura occurs.
Before a migraine starts, a wave of electrical activity moves across the brain’s surface, followed by a period when activity slows down. This process, called cortical spreading depression, temporarily interferes with normal brain signals and causes the sensory symptoms of aura.
Aura usually lasts between 5 and 60 minutes and goes away on its own. After that, the headache phase begins. About 25 to 30 percent of people with migraine experience aura at some point.
What Does Aura
Feel Like?
Aura can look different for each person, but there are some common patterns to know.
Visual aura is the most common type. People often describe:
- Blinking or shimmering at the edge of their vision
- Zigzag or arc-shaped patterns (sometimes called a “fortification spectrum”)
- A blind spot or area of blurred vision
- Tunnel vision or partial loss of sight in one eye
Aura can also cause symptoms besides vision changes, such as:
- Sensory changes: tingling or numbness that often starts in the hand and moves up the arm toward the face
- Language difficulty: trouble finding words or speaking clearly
- Motor weakness: heaviness or weakness on one side of the body (less common, and worth discussing with a provider)
How Is It Diagnosed?
There is a clear neurological reason that an aura occurs.
Before a migraine starts, a wave of electrical activity moves across the brain’s surface, followed by a period when activity slows down. This process, called cortical spreading depression, temporarily interferes with normal brain signals and causes the sensory symptoms of aura.
Aura usually lasts between 5 and 60 minutes and goes away on its own. After that, the headache phase begins. About 25 to 30 percent of people with migraine experience aura at some point.
Migraine With Aura vs. Without: How to Tell the Difference
Both types involve the same main migraine symptoms: moderate to severe head pain, sensitivity to light and sound, and often nausea. The difference is whether neurological symptoms come before the headache.
Some people have aura without any headache, which is called a silent migraine. The visual or sensory symptoms happen, but no headache follows. This can feel unsettling the first time, especially if you don’t know what it is.
What Sets Off a
Migraine With Aura?
Triggers for migraine with aura are often the same as for other migraines, though they can vary from person to person. The most common ones include:
- Sleep disruption: both too little and too much
- Hormone changes: especially around menstruation, perimenopause, or changes in contraception
- Stress: and the let-down period after stress
- Skipping meals or dehydration
- Sensory overload: bright lights, strong smells, loud environments
- Weather changes: shifts in barometric pressure
Treatments That
Really Help
Managing migraine with aura usually involves having a plan for when an episode starts and a long-term strategy to reduce how often they occur.
When a Migraine
Is Coming On
Triggers for migraine with aura are often the same as for other migraines, though they can vary from person to person. The most common ones include:
- CGRP inhibitors taken at the onset of aura or other symptoms are very effective in preventing progression to the migraine phase.
- Triptans are another acute option. They work best when taken early in the headache phase, not during the aura.
- NSAIDs and combination pain relievers can help with milder episodes.
- Anti-nausea medicines are often used along with pain relief.
Preventing Episodes From Happening
For people who have frequent or severe migraines, preventive therapy may be helpful:
- CGRP inhibitors, given as daily tablets or monthly/quarterly injections, have strong evidence and have helped many of our patients.
- Botulinum toxin injections are recommended for chronic migraine, which means 15 or more headache days each month.
The Lifestyle
Side of Things
It may not sound exciting, but getting enough sleep, eating regular meals, drinking plenty of water, and building good stress-management habits really help many people.
A Few Questions
We Hear Often
Is migraine with aura dangerous? For most people, it is not. However, there is a slightly higher risk of stroke, especially in women who smoke or use estrogen-containing birth control. Your provider can help you determine your risk level.
Can aura happen without a headache? Yes, silent migraine is real. If you have sudden visual or neurological symptoms, get checked to rule out other causes.
Is Aura different from a TIA (mini-stroke)? Both can involve sudden visual or sensory symptoms. The key difference is onset: aura builds slowly over several minutes, while TIA symptoms tend to appear abruptly. When in doubt, especially with new or unusual symptoms, seek emergency evaluation.
Will my migraines get worse over time? Not always. Migraine patterns can change as you get older. With good management, many people are able to reduce how often and how severe their migraines are.
You Don’t Have to Manage This Alone
Migraine with aura is a well-understood neurological condition. It has a name, a clear explanation, and, most importantly, effective treatment options.
If you are in the Westmont area or anywhere in the western suburbs of Chicago and migraines are affecting your quality of life, we encourage you to come in for an evaluation. Many patients come to us after years of handling symptoms on their own or being told there is not much that can be done. That is rarely the case.
At The Headache Lab, we take the time to understand your whole situation and create a plan that is customized to you, not just a standard approach. Migraine care that works is personal.
