Yes, for the majority of people diagnosed with Multiple Sclerosis, symptoms do come and go. This pattern is a hallmark of the most common form of the condition, known as Relapsing Remitting Multiple Sclerosis. In this phase, individuals experience periods where new symptoms appear, or old ones resurface, known as relapses, followed by periods of recovery where symptoms may disappear entirely or significantly improve, known as remission. These cycles occur because the immune system attacks the myelin in bursts of activity. When the inflammation calms down, the body can often repair some of the damage, allowing function to return. However, as the condition progresses, some symptoms may become more persistent, making it essential to understand the different ways these patterns manifest.
What we will discuss in this article
- The difference between relapsing and progressive patterns
- Understanding true relapses and how long they last
- Distinguishing between a relapse and a pseudo relapse
- Common triggers for temporary symptom flare ups
- The role of remission and the potential for residual symptoms
- How treatments influence the frequency of symptom cycles
- Emergency guidance for sudden or severe neurological changes
Relapsing versus Progressive patterns
The way symptoms behave depends largely on the specific type of Multiple Sclerosis a person has.
Approximately 85 per cent of people are initially diagnosed with the relapsing remitting form. In this type, the coming and going of symptoms is very distinct. Bouts of activity can last from a few days to several months, followed by long periods of stability. In contrast, those with Primary Progressive Multiple Sclerosis experience symptoms that gradually worsen from the outset without clear periods of disappearance. Over time, many people with the relapsing form may transition into Secondary Progressive Multiple Sclerosis, where the coming and going pattern fades, and symptoms become a constant, gradual presence.
What defines a true relapse?
In a clinical setting, not every temporary increase in symptoms is considered a true relapse or attack.
To be classified as a true relapse, the following criteria must generally be met:
- Duration: The new or worsening neurological symptoms must last for at least 24 hours.
- Separation: The symptoms must occur at least 30 days after the start of any previous relapse.
- Lack of Triggers: The change must occur in the absence of an infection or a change in core body temperature.
A true relapse is caused by new inflammation and the formation of new lesions in the brain or spinal cord. Once the inflammation settles, the body enters remission. While many people recover fully from early relapses, about half of all attacks may leave behind some lingering or permanent symptoms.
Identifying a Pseudo Relapse
Many people experience times when their old symptoms seem to return or worsen for a few hours or a day, but this is often a pseudo relapse rather than new disease activity.
A pseudo relapse occurs when an old area of nerve damage becomes temporarily more sensitive due to external stress on the body. This does not mean your condition is getting worse or that new damage is occurring; it simply means the damaged nerves are struggling to keep up with the current demand.
- Common Triggers: Heat, known as the Uhthoff phenomenon, intense stress, extreme fatigue, or a minor infection.
- Recovery: These symptoms typically resolve quickly once the trigger is removed, such as cooling down after a hot bath or recovering from a cold.
The role of treatment in symptom cycles
Modern medicine has significantly changed how symptoms come and go by targeting the underlying immune response.
Disease Modifying Therapies are designed to reduce the frequency and severity of relapses. By calming the immune system, these treatments can extend the periods of remission, sometimes for many years. When a severe relapse does occur, clinicians may use high dose steroids to reduce inflammation quickly and shorten the duration of the attack. While steroids help you recover faster, they do not change the long term progression of the disease, which is why consistent use of a preventative therapy is the primary clinical focus.
Emergency guidance
While Multiple Sclerosis is a fluctuating condition, some sudden changes require immediate clinical evaluation to ensure your safety.
Seek immediate medical help if you experience a sudden loss of vision in both eyes, a total inability to walk, or a sudden change in speech and facial symmetry.
Seek urgent medical advice if you notice:
- A relapse that is so severe it prevents you from performing basic self care
- New and total numbness in the saddle area
- Signs of a serious infection, such as a very high fever or severe confusion
- Sudden, intense eye pain that prevents any movement of the eye
- Symptoms of a severe systemic reaction to a new medication
To summarise
Symptoms of Multiple Sclerosis frequently come and go, especially in the early years of the condition. These cycles of relapse and remission are caused by the immune system attacking and then retreating from the central nervous system. While a true relapse involves new damage and lasts for days or weeks, many temporary flare ups are pseudo-relapses triggered by heat or stress. Understanding these patterns helps in distinguishing between temporary fluctuations and the need for medical intervention. With the help of modern treatments and proactive management, many individuals can significantly reduce the frequency of these cycles and maintain a stable, high quality of life.
How long does a typical remission last?
Remissions are unpredictable; they can last for a few months or several decades. Modern treatments are highly effective at making these stable periods last longer.
Can a relapse happen without me noticing?
Yes. These are known as silent lesions. Sometimes inflammation occurs in a part of the brain that does not produce obvious physical symptoms but can be seen on an MRI.
Does every relapse need steroids?
No. Mild relapses, such as slight tingling or manageable fatigue, are often left to improve on their own to avoid the side effects of steroid treatment.
Will I always go back to 100 percent after a relapse?
While many people do, especially early on, some relapses leave permanent scars on the nerves, resulting in some lingering symptoms even during remission.
Can stress cause a true relapse?
The link is complex. While stress is a major trigger for pseudo relapses, many experts believe chronic high stress can also increase the risk of a true inflammatory relapse.
Why did my old symptoms come back when I had the flu?
This is a classic pseudo relapse. The fever and stress of the infection made your old nerve damage temporarily more apparent.
How often should I have an MRI to check for relapses?
Most stable patients have an annual MRI, but your neurologist may recommend more frequent scans if you are starting a new treatment or experiencing frequent symptoms.
Authority Snapshot
This article was reviewed by Dr. Rebecca Fernandez, a UK trained physician with an MBBS and extensive experience in internal medicine, neurology, and cardiology. Her background includes the stabilization of acute trauma and the management of complex inpatient care, alongside a focus on integrating digital health solutions for long term wellness. Dr. Fernandez is dedicated to helping patients understand the fluctuating nature of neurological conditions to ensure they receive timely and effective clinical support.
