
Multiple sclerosis (MS) is an autoimmune disorder that damages the central nervous system. An autoimmune disease is a condition where the body’s immune system attacks healthy cells and tissue. The central nervous system consists of the brain and spinal cord.
When a person has MS the immune system attacks myelin. Myelin is a layer of fatty tissues and proteins that cover and protect nerves. Damage to myelin disrupts communication between the brain and different parts of the body.
What are the symptoms of MS?
Symptoms of MS can include muscle weakness, problems with balance and coordination, and problems with thinking and memory. People with MS may experience numbness, “pins and needles” sensations, and pain. People may also experience problems with the eyes—double vision, blurred vision, colors that appear gray, uncontrolled eye movements.
What are the different types of MS?
There are different types of MS. The most common type is relapsing-remitting MS.
Relapsing-remitting MS (RRMS)
Individuals with this type will experience episodes where symptoms get worse or new symptoms appear. Between episodes, there are periods where there is a full or partial recovery. Other types of MS include:
Secondary-progressive MS (SPMS)
Many people with RRMS eventually develop this type. A person may experience partial recoveries, but symptoms will progress and become more severe with each episode.
Primary-progressive MS (PPMS)
Symptoms become progressively worse from the beginning and there are no periods of remission. Primary progressive MS affects about 15 percent of people with MS.
Clinically isolated syndrome (CIS)
Another disease course is clinically isolated syndrome (CIS). This is a single episode of neurological symptoms where the immune system attacks the central nervous system, but there are no additional episodes. If additional episodes occur, CIS will be reclassified as MS.
What is the treatment for MS?
There is no cure for MS, but the condition can be managed. The main treatments for MS are disease-modifying therapies (DMTs). These are medications that help prevent episodes and slow the progression of MS. Therapies to lessen the severity of relapses and control symptoms are also a part of treatment. Exercise, physical therapy, lifestyle changes, and social support are also important.
MS treatment can change with time. A person may need to switch from one DMT to another for a variety of reasons—a medication is not working as well as it needs to, side effects, changes to insurance, or difficulty taking the medication as directed.
Changes in treatment should always be done under the guidance of a healthcare provider. As a person living with MS, it is also important to take an active role in your care.
Ask your healthcare provider these questions when changing treatment or starting a new treatment:
- What is the name of the medication?
- How is this medication taken? Is it a pill, injection, or infusion?
- What is the dosage that I will be taking?
- Why is this medication being recommended?
- How does this medication treat MS?
- Can this medication cause side effects?
- How will we know if this medication is working?
- When will we know if this medication is working?
- What can we do if this medication does not work?
- What does this medication cost?
- Can this medication interact with other medications? Your healthcare provider should have a list of all medications you are taking. This list should include prescription medications, over-the-counter medications, vitamins, nutritional supplements, and herbal supplements.
- Can this medication affect pregnancy? Tell your healthcare provider if you are pregnant or planning on becoming pregnant.
- What does this medication cost? Who can I talk to if I am concerned about the cost of this medication.
Your healthcare providers will be your best source of information. Always ask questions if something is not clear or if you want an explanation.
Sources: National Institute of Neurological Disor... + 8
- National Institute of Neurological Disorders and Stroke. Multiple Sclerosis (MS). December 17, 2025.
- MedlinePlus. Multiple sclerosis. January 27, 2026.
- National Multiple Sclerosis Society. Vision Disorders and Multiple Sclerosis. Accessed October 27, 2026.
- Antonio Barreiro González, Maria T. Sanz, et al. Dyschromatopsia in multiple sclerosis reflects diffuse chronic neurodegeneration beyond anatomical landmarks. Acta Ophthalmologica, December 20, 2022.
- Dawood Tafti, Moavia Ehsan, and Kathryn L. Xixis. Multiple Sclerosis. StatPearls. March 20, 2024.
- NYU Langone Health. Types of Multiple Sclerosis. Accessed October 27, 2026.
- National Multiple Sclerosis Society. Clinically Isolated Syndrome. Accessed October 27, 2026.
- Cleveland Clinic. Switching Disease Modifying Therapies in Multiple Sclerosis. Accessed October 27, 2026.
- MedlinePlus. Taking medicines – what to ask your provider. January 14, 2026.




