Understanding Long Covid – Symptoms, Cause
What is Long Covid?
Long Covid refers to symptoms that persist or appear after a coronavirus infection. Typically, the symptoms last for more than four weeks after the acute infection. The symptoms can vary considerably. Those affected often report persistent fatigue, difficulty concentrating ("brain fog"), shortness of breath, circulatory problems, pain, or sleep disturbances. In some people, the symptoms disappear after a while, while in others they can persist longer. Long Covid affects several bodily systems simultaneously, including the nervous system, the immune system, and energy metabolism. Therefore, experts often refer to it as a multisystemic illness. It is also important to distinguish between the two terms: Long Covid is generally diagnosed when symptoms persist for more than four weeks after infection. If the symptoms last for more than three months, the term Post-Covid Syndrome is often used. In some cases, the symptoms may also meet the criteria of an illness such as ME/CFS, especially if there is a stress-related worsening of symptoms.
What are typical symptoms of Long Covid?
The most common symptoms include: severe physical and mental exhaustion, post-exertional malaise (worsening after exertion), and difficulty concentrating ("brain fog"). Unrestorative sleep Circulatory problems upon waking Muscle and joint pain Increased sensitivity to light or noise The severity can vary greatly from person to person.
Why does Long Covid worsen after exertion?
A key characteristic of Long Covid-ME/CFS is post-exertional malaise (PEM). Symptoms often worsen significantly hours or days after physical or mental exertion. Even everyday activities can then lead to a severe deterioration. The reasons for this effect are currently being intensively researched. Studies suggest that changes in the nervous system, the immune system, and cellular energy metabolism may play a role.
What are possible biological connections?
Long Covid-19 – ME/CFS is now understood as a multisystem disease. Research is investigating, among other things, changes in: the regulation of the nervous system, the function of the immune system, energy production in cells, and communication between different body systems. These complex interrelationships are the subject of current scientific research.
How is Long Covid diagnosed?
There is currently no single test that can definitively diagnose Long Covid. The diagnosis is therefore primarily based on the patient's medical history, typical symptoms, and a physical examination. The connection to a previous Covid-19 infection is crucial. If symptoms appear after an infection or persist for an extended period, Long Covid may be suspected. Doctors typically conduct various examinations, such as blood tests, and assessments of the heart, lungs, or circulatory system, to rule out other possible causes of the symptoms. Only when other illnesses cannot explain the symptoms can a diagnosis of Long Covid be made. If symptoms persist for more than four weeks, it is often referred to as Long Covid. If symptoms last for more than three months and cannot be explained by other illnesses, it is usually called Post-Covid Syndrome. Because Long Covid can affect different bodily systems, diagnosis is often interdisciplinary, involving various medical specialties.
What is pacing?
Pacing is an energy management strategy for illnesses such as ME/CFS or Long Covid. It teaches those affected to consciously allocate their available energy and manage physical, mental, and emotional stress in such a way as to avoid overload. The goal is to stay within one's own limits and prevent so-called "crashes" or worsening of symptoms as much as possible.
Is Long Covid a mental illness?
No. Long Covid - ME/CFS is a physical, multisystemic illness. This means that several bodily systems are affected simultaneously – including the nervous system, the immune system, energy metabolism, and often the cardiovascular system. The fact that the illness was sometimes previously classified as psychological is primarily due to the fact that many of the biological mechanisms were not sufficiently understood for a long time. Numerous scientific studies now show that measurable changes occur in various bodily systems in ME/CFS. Therefore, ME/CFS is not a mental illness, but a complex physical illness involving multiple biological systems.
Is it possible to recover from a long-term Covid diagnosis?
The course of Long Covid can vary greatly. Some people experience significant improvements in their resilience over time, while in others the illness persists longer or progresses in phases. Scientific literature and personal accounts from those affected contain stories of recovery and significant improvement. At the same time, there is currently no therapy that reliably leads to a cure for everyone. Therefore, Long Covid and ME/CFS are currently considered complex illnesses whose course can vary considerably from person to person. Many sufferers report, however, that a better understanding of the illness, adapted energy management, and a gradual stabilization of the body can help improve resilience. Even though the process often takes time and unfolds differently for each individual, many experiences show that the body can change and adaptation processes are possible. Hope and realistic support are therefore important factors on the path to stabilization.
Is Long Covid an autoimmune disease?
Long Covid is not currently classified as a classic autoimmune disease. Rather, it is a multisystemic physical illness involving several areas of the body – including the nervous system, the immune system, energy metabolism, and often the cardiovascular system. Some studies have found autoantibodies in a subset of affected individuals, for example, against certain receptors of the nervous system. This has led some researchers to discuss whether autoimmune-like mechanisms might play a role. To date, however, there is no unified scientific classification that definitively defines Long Covid as an autoimmune disease.
Can Long Covid be detected in the blood?
Currently, there is no single blood test that can definitively diagnose Long Covid. The diagnosis is therefore primarily based on typical symptoms and international diagnostic criteria, such as the Canadian Consensus Criteria (CCC) or the International Consensus Criteria (ICC). Blood tests nevertheless play an important role. They are mainly used to rule out other conditions that can cause similar symptoms, such as thyroid disorders, inflammation, nutritional deficiencies, or other internal medical conditions. Research is increasingly investigating biological changes in ME/CFS, for example, in the immune system, energy metabolism, or certain neurotransmitters. These findings indicate that measurable physiological changes can occur in Long Covid. However, there is currently no standardized laboratory test that is routinely used for diagnosis.
Is there a medication for long-term Covid treatment?
Derzeit gibt es kein zugelassenes Medikament, das Long covid gezielt heilen oder die Ursache der Erkrankung beseitigen kann. Die Behandlung konzentriert sich deshalb vor allem darauf, Symptome zu lindern und den Alltag besser zu stabilisieren.