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Muscle pain and weakness are common symptoms of COVID-19, often persisting in those suffering from long COVID. The type and degree of muscle pain vary greatly from person to person, ranging from mild tenderness to debilitating pain. While the exact cause of muscle pain from viral infections is not fully understood, it is believed to be related to the body's immune response, with inflammation playing a key role. Studies have also found that people taking statins to lower cholesterol experienced more muscle pain when infected with COVID-19.
| Characteristics | Values |
|---|---|
| Muscle pain | Fever, fatigue, chronic malaise, chills, headache, loss of appetite, gastrointestinal infection, joint pain, weakness, inflammation, myalgia, myositis, rhabdomyolysis |
| Muscle pain treatment | Rehabilitation, exercise |
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Muscle pain and weakness
The cause of muscle pain in viral infections is not entirely understood. One theory suggests that it is related to the inflammatory response of the immune system, which releases cytokines, small proteins that regulate immune system activity. In particular, interleukin 1-beta (IL-1b), interleukin 6 (IL-6), and tumor necrosis factor-alpha (TNF-a) are associated with muscle pain. High levels of IL-6 in the muscle have been linked to pain and muscle fiber breakdown in viral infections. The muscle's response to these cytokines is to produce elevated levels of prostaglandin E₂ (PGE₂), a molecule associated with inflammation and pain.
Another possible factor contributing to muscle pain in viral infections is the physical stress the illness puts on the body. Additionally, an imbalance of electrolytes like potassium and sodium, which are essential for muscle health, may play a role. In some cases, muscle pain and weakness may be due to an underlying chronic condition, such as an imbalance in the immune system causing chronic muscle inflammation.
Research has shown that long COVID, or post-COVID condition (PCC), can also cause muscle pain and weakness. This condition is defined by symptoms lasting for three months or longer after the initial illness. Studies have also found that the muscles of people with long COVID respond differently to workouts after a period of inactivity compared to those who have been healthy. This suggests that the fatigue experienced by people with long COVID is not solely due to a lack of physical activity but may be related to changes in muscle fibers.
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Myalgia
In the case of COVID-19, studies have shown that myalgia is a common symptom at the onset of the disease, affecting up to 36% of patients. However, it is important to note that myalgia may not be associated with the severity of COVID-19. Out of 2,445 COVID-19 patients in one study, 448 (18.3%) presented with myalgia, but there was no statistical association between myalgia and severe COVID-19 disease.
Additionally, long COVID or post-COVID conditions can cause muscle pain and fatigue. Research has shown that the muscles of people with long COVID respond differently to workouts after a period of inactivity compared to healthy individuals. This suggests that their muscle function is altered, which should be considered during treatment and rehabilitation.
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Long Covid
Muscle pain is a common symptom of COVID-19, and for some people, these aches and pains persist long after the initial infection, contributing to what is known as Long COVID. Long COVID is defined by the CDC as the presence of symptoms lasting for three months or longer after the initial illness, and muscle pain is among the dozen-plus symptoms identified by the CDC as being part of this post-COVID condition.
The muscle pain experienced by people with Long COVID can make daily activities challenging. Simple activities like walking, standing for long periods, or holding objects may become difficult. This pain can be linked to inflammation triggered by the immune system's response to the virus. When the body fights off an infection, it releases chemicals that cause inflammation, which can lead to muscle soreness and stiffness. In some cases, this inflammation persists long after the initial infection, resulting in lingering muscle pain.
The muscles of people with Long COVID have been found to respond differently to a workout after a period of inactivity compared to the muscles of healthy people. Researchers have shown that the fatigue and struggle experienced by people with Long COVID are not due to a lack of physical fitness. There is no muscle breakdown in patients with Long COVID, while healthy people experience a clear decrease in muscle after a period of bed rest.
Managing Long COVID muscle pain requires a multi-faceted approach. Low-impact exercises like yoga, tai chi, or swimming can improve flexibility and reduce stiffness. Over-the-counter pain relievers, such as ibuprofen, can help reduce inflammation. Hot and cold therapy can also be beneficial, with warm compresses relaxing muscles and ice packs reducing inflammation. Staying hydrated and prioritising good sleep habits are also important, as poor sleep can worsen muscle pain.
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Cytokines
Muscle pain is a common symptom of viral infections, including COVID-19. While the coronavirus primarily affects the respiratory tract, it can also cause muscle aches and joint pain. This pain can range from mild to severe and may feel like tightness in the muscles or radiate throughout the body.
In the context of muscle pain associated with COVID-19, certain cytokines have been identified as key contributors. These include interleukin 1-beta (IL-1b), interleukin 6 (IL-6), and tumor necrosis factor-alpha (TNF-a). High levels of IL-6, in particular, have been linked to muscle pain in influenza and other viral infections. This pain may be related to muscle fiber breakdown or rhabdomyolysis caused by these infections.
The release of cytokines leads to an increase in the production of prostaglandin E₂ (PGE₂) by the muscles. PGE₂ is a lipid molecule that is associated with inflammation and pain. Therefore, the elevated levels of these cytokines can directly contribute to the muscle pain experienced by individuals with COVID-19.
Additionally, it is important to note that muscle pain associated with COVID-19 can persist even after the infection has cleared, a condition often referred to as Long COVID or Post-COVID syndrome. The duration of muscle aches can vary, with children typically experiencing them for four to five days, while adults may take over three months to recover. In some cases, the inflammation caused by the immune response to the coronavirus can lead to chronic pain, impacting an individual's quality of life.
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Muscle inflammation
Muscle pain and inflammation are common symptoms of viral infections, including COVID-19. This pain can be similar to that experienced with mild arthritis. While the virus primarily affects the respiratory tract, it can also cause inflammation and pain in the muscles.
In the case of COVID-19, muscle inflammation and pain are believed to be caused by an uncontrolled release of pro-inflammatory cytokines, small proteins that activate an immune response. Cytokines such as interleukin 1-beta (IL-1b), interleukin 6 (IL-6), and tumour necrosis factor-alpha (TNF-a) have been associated with muscle pain in viral infections. High levels of IL-6, in particular, have been linked to muscle fibre breakdown or rhabdomyolysis, resulting in muscle tears and pain.
Additionally, COVID-19 can lead to inflammation of the heart muscle, known as myocarditis. Myocarditis is an inflammatory disease where pathogens, often viruses, attack the heart muscle tissue. This condition can cause symptoms such as chest pain, shortness of breath, palpitations, and fatigue. Research suggests that inflammation from COVID-19 can contribute to heart damage, including arrhythmia and an increased risk of blood clots, heart attack, or stroke.
It is important to note that muscle inflammation and pain can also persist long after the initial COVID-19 infection. Studies have shown that people with long COVID exhibit muscle changes and respond differently to physical inactivity compared to healthy individuals. These muscle changes can contribute to the fatigue commonly reported in long COVID patients.
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Frequently asked questions
Muscle pain and weakness are common symptoms of COVID-19. The type and degree of pain vary from person to person, ranging from tenderness to being bedridden.
The prevailing theory is that muscle pain is caused by the body's inflammatory response to the virus. Cytokines, which are released by the immune system, lead to inflammation and pain.
In some cases, muscle pain may be caused by an imbalance of electrolytes, such as potassium and sodium, which are important for muscle health.
Muscle aches can linger for weeks after the initial infection and are considered a symptom of long COVID, defined as symptoms lasting for three months or more after the initial illness.
There are no specific treatments mentioned, but the ZOE COVID Study found that muscle aches are among the top 10 symptoms of COVID-19, so it is important to take them seriously.
