Understanding Colds and Flu With Multiple Sclerosis

People with MS are more likely to catch colds and the flu, especially if they take immunosuppressive medications. These medications weaken the immune system, making it harder to fight infections.

Cold symptoms come on gradually and are milder, lasting a few days. Flu symptoms appear suddenly and are more severe, lasting weeks and sometimes leading to complications like pneumonia. The flu is also more likely to bring on a fever.

A fever from the flu can temporarily worsen MS symptoms, a condition called "pseudoexacerbation." An increased body temperature can bring it on, but it doesn't mean a relapse of the disease, which involves new or worsening symptoms lasting over 24 hours. Pseudoexacerbation can also be caused by stress, an infection, fatigue, and dehydration.

Rest, hydration, and nutritious foods are key. Over-the-counter meds can help with fever and cough. If flu symptoms appear, see a doctor within 48 hours for antiviral medications to lessen symptoms and risks.

Flu vaccines are recommended for people with MS and don't increase the risk of relapse. Avoid high-dose and nasal spray vaccines. Practice good hygiene like frequent hand washing, and avoid sick people to reduce infection risk.