Have you been exposed to environmental hazards that may have contributed to your MS or worsened your flare-ups?
Many environmental factors have been linked to MS risk and disease progression. While no single exposure definitively causes MS, research suggests several environmental hazards may play a role.
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Have you been exposed to environmental hazards that may have contributed to your MS or worsened your flare-ups?
Many environmental factors have been linked to MS risk and disease progression. While no single exposure definitively causes MS, research suggests several environmental hazards may play a role.
Common environmental risk factors include:
- Smoking - Women who smoke are 1.6 times more likely to develop MS, and smoking is associated with faster disease progression
- Low vitamin D/limited sun exposure - Vitamin D deficiency is linked to increased MS risk and more active lesions
- Air pollution - High levels of particulate matter (PM2.5 and PM10) and nitrogen oxides have been associated with higher MS prevalence and increased relapse rates
- Epstein-Barr Virus (EBV) - People with EBV have 32 times the risk of developing MS
- Obesity during adolescence - Being overweight as a teenager or young adult is linked to earlier MS onset
Other possible factors:
- Exposure to organic solvents and certain chemicals
- Working night shifts
- Living in areas with higher pollution levels
A MyMSTeam member who worked as a disaster relief counselor after 9/11 wondered if chemical exposure contributed to their MS risk, noting that it likely takes multiple environmental and genetic factors working together rather than just one trigger.
If you're concerned about environmental exposures affecting your MS, discuss this with your neurologist to develop strategies for managing modifiable risk factors.
November 13, 2025
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