Research shows multiple sclerosis is often preceded by a prodromal phase lasting years before diagnosis. According to Gram Research analysis of 113,876 women, those who developed MS showed migraines 9-10 years earlier (22.8% vs. 19.3%), plus depression, urinary problems, and declining physical activity years before their first MS symptom appeared. This suggests MS develops gradually with detectable early warning signs.
Researchers followed over 113,000 women for years and discovered that multiple sclerosis (MS) doesn’t just appear suddenly—it’s often preceded by warning signs. According to Gram Research analysis, conditions like migraines, depression, and urinary problems showed up 9-10 years before women developed MS. Additionally, women who later developed MS experienced a noticeable decline in physical activity and energy levels years before their first MS symptoms appeared. This suggests MS has a “prodromal phase”—a period where the body shows early warning signs before the disease officially develops. Understanding these early indicators could help doctors identify and potentially help people at risk for MS much sooner.
Key Statistics
A prospective cohort study of 113,876 women from the Nurses’ Health Study II found that migraine prevalence reached 22.8% in women who later developed MS compared to 19.3% in the underlying cohort, appearing 9-10 years before MS diagnosis.
Research reviewed by Gram identified that depression, urinary leakage, and restless legs syndrome were significantly more prevalent in the 336 women who subsequently developed MS compared to the broader cohort, suggesting these conditions may be early indicators of MS development.
The 2026 cohort study found that physical activity, physical function, and vitality declined measurably in years preceding MS diagnosis, indicating a gradual prodromal phase rather than sudden disease onset.
Among 336 incident MS cases tracked in the Nurses’ Health Study II, dietary changes were less pronounced than medical conditions and physical decline, suggesting lifestyle factors beyond diet play a more prominent role in the MS prodrome.
The Quick Take
- What they studied: Whether certain health problems, lifestyle changes, and symptoms appear in people years before they develop multiple sclerosis
- Who participated: 113,876 women from the Nurses’ Health Study II who were followed over many years, including 336 women who later developed MS
- Key finding: Women who developed MS showed specific health problems like migraines, depression, and urinary leakage 9-10 years before their first MS symptoms, with migraine rates reaching 22.8% compared to 19.3% in women without MS
- What it means for you: If you experience migraines, depression, or notice declining energy and physical activity, it doesn’t mean you’ll definitely get MS, but these changes warrant discussion with your doctor. Early detection of these patterns could lead to earlier medical attention and monitoring.
The Research Details
Researchers used data from the Nurses’ Health Study II, a long-term health study tracking over 113,000 women. They collected detailed information about each woman’s health, lifestyle, diet, and symptoms over many years. When women developed MS, researchers looked backward at their health records to see what had changed in the years before diagnosis. This “looking back” approach allowed them to identify patterns that appeared before MS symptoms started. By comparing women who developed MS to those who didn’t, researchers could spot which health problems and lifestyle changes were more common in the MS group.
This study design is powerful because it follows people forward in time before they get sick, rather than asking people to remember what happened years ago. The researchers had detailed, accurate information collected regularly, not just memories. They examined many different factors including specific medical conditions, physical activity levels, energy levels, and diet to create a complete picture of what happens before MS develops.
The study focused on women because the Nurses’ Health Study II is an all-female cohort, and MS is more common in women than men. The findings may or may not apply equally to men, which is an important limitation to consider.
Understanding what happens before MS develops is crucial because MS is a serious neurological disease that can cause disability. If doctors can identify people in this early “prodromal phase,” they might be able to intervene earlier, potentially slowing disease progression or improving outcomes. Currently, MS is often diagnosed only after the first obvious symptoms appear, which may be too late for early intervention. This research suggests there’s a window of opportunity—years before diagnosis—when people show warning signs that could prompt medical evaluation and monitoring.
This study has significant strengths: it followed a very large number of women (over 113,000), collected health information regularly over many years rather than relying on memory, and identified 336 women who developed MS for comparison. The study was published in a peer-reviewed journal focused on MS research. However, the study only included women, mostly nurses, so results may not apply equally to men or other populations. The study shows associations (things that happen together) but cannot prove that these early signs directly cause MS. Additionally, the study was observational, meaning researchers watched what happened naturally rather than testing an intervention.
What the Results Show
The research revealed a clear pattern: several medical conditions appeared more frequently in women years before they developed MS. Migraines were particularly notable—they became more common 9-10 years before MS diagnosis, reaching 22.8% in women who developed MS compared to 19.3% in women who didn’t. Depression, urinary leakage, and restless legs syndrome (a condition causing uncomfortable sensations in the legs) also appeared more often in the pre-MS group.
Beyond specific medical conditions, researchers found that women who later developed MS experienced a gradual decline in physical activity and physical function years before their first MS symptoms. Their energy levels and vitality also decreased during this pre-symptom period. These changes weren’t sudden—they developed gradually over years, suggesting a slow progression of underlying disease activity.
Interestingly, dietary changes were less pronounced and didn’t show the same clear pattern as the medical conditions and physical changes. This suggests that while diet may play some role in MS, the major warning signs involve specific health conditions and declining physical function.
The timeline is important: these warning signs appeared years—sometimes nearly a decade—before women experienced their first recognized MS symptom. This extended prodromal phase suggests MS doesn’t suddenly appear but develops gradually with detectable changes in the body’s function.
The study found that the combination of multiple warning signs appeared together in women who developed MS, rather than just one isolated symptom. This clustering of symptoms—migraines plus depression plus declining activity—may be more predictive than any single factor alone. The research also showed that physical decline was gradual and measurable, not a sudden drop in function. Women’s vitality and energy decreased progressively over the years before MS diagnosis, suggesting ongoing changes in the nervous system.
Previous research has suggested MS has a prodromal phase, but most studies looked backward after diagnosis or examined small groups. This study is notable because it prospectively followed a very large group of women over many years before MS developed, providing stronger evidence. The findings align with emerging understanding that MS is a disease with a long pre-clinical phase, but this research provides more specific details about which symptoms appear and when. The identification of migraines, depression, and urinary problems as early indicators adds to growing evidence that these conditions may be early manifestations of MS-related nervous system changes.
The study only included women, primarily nurses, so results may not apply equally to men or other populations. The study shows that these conditions occur together more often in people who develop MS, but cannot prove they cause MS or that everyone with these symptoms will develop MS. The research is observational, meaning researchers watched what happened naturally rather than testing whether treating these early symptoms could prevent MS. Additionally, MS diagnosis itself can be subjective and may have changed over the study period, potentially affecting results. The study also couldn’t account for all possible factors that might influence MS development, such as genetic predisposition or viral infections.
The Bottom Line
If you experience migraines, depression, urinary problems, or notice declining energy and physical activity, discuss these changes with your doctor—especially if they’re new or worsening. While these symptoms don’t mean you’ll definitely develop MS, they warrant medical evaluation. Maintaining physical activity and addressing depression through treatment may be beneficial for overall health. If you have a family history of MS or are concerned about MS risk, ask your doctor about monitoring and early screening. Confidence level: Moderate—these are associations, not proven causes, but they warrant medical attention.
Anyone experiencing the identified warning signs (migraines, depression, urinary leakage, restless legs syndrome) should pay attention, particularly women, as MS is more common in women. People with a family history of MS should be especially aware. Healthcare providers should consider these early indicators when evaluating patients for neurological disease. Researchers studying MS and neurological disease progression should note these findings. Men should be cautious about applying these findings directly, as the study only included women.
The warning signs identified in this study appeared 9-10 years before MS diagnosis in many cases, though the timeline likely varies between individuals. Physical decline and energy loss developed gradually over years. If you notice these changes, medical evaluation should happen relatively soon, but benefits from early intervention would likely develop over months to years, not days or weeks.
Frequently Asked Questions
What are the early warning signs that someone might develop multiple sclerosis?
Research shows migraines, depression, urinary leakage, and restless legs syndrome appear more frequently years before MS diagnosis. Additionally, declining physical activity, reduced energy levels, and decreased physical function are common early indicators. These signs may appear 9-10 years before the first recognized MS symptom.
How long before MS diagnosis do warning signs typically appear?
According to the Nurses’ Health Study II, several warning signs appeared 9-10 years before MS diagnosis. Physical decline and energy loss developed gradually over years rather than suddenly. However, the timeline varies between individuals, and not everyone with these symptoms will develop MS.
If I have migraines and depression, does that mean I’ll get multiple sclerosis?
Not necessarily. While migraines and depression appeared more frequently in women who developed MS, many people with these conditions never develop MS. These symptoms warrant discussion with your doctor, especially if they’re new, worsening, or accompanied by other changes like declining energy or physical function.
Can early detection of these warning signs help prevent or delay multiple sclerosis?
This study shows these warning signs exist but doesn’t prove that treating them prevents MS. However, early medical evaluation and monitoring could enable earlier intervention if MS develops. Maintaining physical activity and treating depression are beneficial for overall health regardless of MS risk.
Does this research apply to men as well as women?
This study only included women, so results may not apply equally to men. MS is more common in women, and men’s prodromal patterns might differ. Men concerned about MS risk should discuss their symptoms with a healthcare provider rather than assuming these findings apply directly to them.
Want to Apply This Research?
- Track migraine frequency (number per month), energy levels (1-10 scale daily), physical activity (minutes per day), and mood/depression symptoms (using a simple mood scale) to identify patterns over time. Compare your baseline to changes over 3-6 month periods.
- Gradually increase physical activity by 10-15 minutes per week if currently sedentary, track this increase in the app, and monitor how it affects energy levels and overall vitality. Set reminders for consistent activity and log mood changes alongside activity levels.
- Create a long-term health dashboard tracking migraines, energy levels, physical function, and mood over 6-12 month periods. Set alerts if migraines increase by 50% or energy levels drop significantly. Share monthly summaries with your healthcare provider to identify concerning trends early.
This research identifies associations between certain health conditions and MS development but does not prove causation. These findings apply specifically to women and may not generalize to men or other populations. The presence of these warning signs does not mean you will definitely develop MS. If you experience migraines, depression, urinary problems, declining energy, or other concerning symptoms, consult with a healthcare provider for proper evaluation and diagnosis. This information is for educational purposes and should not replace professional medical advice, diagnosis, or treatment. Always discuss any health concerns with a qualified healthcare professional.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.