Athena Vale
Extreme fatigue and muscle weakness can be caused by a variety of factors, ranging from lifestyle choices to underlying medical conditions. Fatigue is a lingering tiredness that is constant and limiting, and it can be caused by a lack of sleep, strenuous exercise, or health conditions such as cancer, stroke, diabetes, or anemia. Muscle weakness, on the other hand, can be caused by nerve issues, muscle injuries, or conditions such as rheumatoid arthritis, lupus, or fibromyalgia. In some cases, muscle weakness may be an indicator of a more serious nervous system issue or other underlying medical condition. It is important to seek medical attention if muscle weakness lasts for an extended period or interferes with daily activities.
| Characteristics | Values |
|---|---|
| Sleep Disorders | Narcolepsy, Insomnia |
| Lack of Use | Extended bed rest |
| Infectious Conditions | Flu, Lyme disease, Meningitis, HIV |
| Chronic Conditions | Epilepsy, Chronic Fatigue Syndrome, Fibromyalgia |
| Neurological Conditions | Migraines, Hemiplegic migraines, Stroke, Spinal cord injury |
| Poisonous Substances | Organophosphates, Botulinum toxin |
| Dehydration | Not drinking enough fluids |
| Nutritional Deficiency | Iron deficiency, Thyroid hormone deficiency |
| Autoimmune Conditions | Rheumatoid arthritis, Lupus, Myasthenia gravis |
| Genetic Disorders | Becker muscular dystrophy |
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What You'll Learn
Chronic fatigue syndrome and fibromyalgia
Fibromyalgia and chronic fatigue syndrome (CFS) are similar conditions with several shared symptoms. Both conditions can cause extreme fatigue and are considered separate but related disorders.
Fibromyalgia is a chronic condition that causes widespread musculoskeletal pain and fatigue. It is characterised by pain all over the body, sleep issues, and increased sensitivity to pain. The pain associated with fibromyalgia is often described as aching, burning, or throbbing, with muscle and joint stiffness also being common. People with fibromyalgia may experience "fibro fog", a hazy feeling that makes it difficult to concentrate. Fibromyalgia is more common in women than in men, and there is no cure for the condition. However, treatments such as exercise, talk therapy, and stress reduction techniques can help manage the symptoms.
Chronic fatigue syndrome, also known as myalgic encephalomyelitis (ME/CFS), is a severe, chronic condition that affects a variety of bodily functions. The distinguishing symptom of CFS is extreme fatigue that does not improve with rest and interferes with daily activities. Other symptoms include widespread pain, sleep issues, and cognitive difficulties. CFS can be diagnosed when the following primary symptoms are present: a substantial decrease in the ability to perform daily tasks due to extreme fatigue lasting for at least six months, an increase in symptoms following minor physical or mental exertion, and unrefreshing sleep. There is no definitive test to diagnose CFS, and the exact causes of the condition are unknown.
While fibromyalgia and CFS share many similarities, they also have distinct features. Fibromyalgia is primarily characterised by widespread pain, while CFS is defined by extreme exhaustion that interferes with normal activities. Additionally, exercise or physical activity often worsens the symptoms of both conditions, and they commonly co-occur in individuals.
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Sleep disorders
One of the most common sleep disorders is sleep apnea, which causes low blood oxygen levels due to blockages preventing air from reaching the lungs. Sleep apnea can interrupt your breathing hundreds of times a night, resulting in sleep deprivation despite a full night's rest. Obstructive sleep apnea can be caused or worsened by being overweight, smoking, or having a unique anatomy that causes a narrow airway.
Narcolepsy is another sleep disorder that can cause extreme fatigue and muscle weakness. People with narcolepsy experience sudden and uncontrollable bouts of sleep, regardless of where they are or what they're doing. This can result in dangerous situations, such as falling asleep while driving or operating heavy machinery.
Shift work sleep disorder is also recognised by the medical community as a legitimate sleep disorder. Working nights or rotating shifts can disrupt your internal clock, making it difficult to fall asleep during the day and stay awake at night. This can lead to chronic sleep deprivation and fatigue.
In addition to these specific sleep disorders, various medications and treatments can also cause or contribute to fatigue. For example, certain prescription medications, such as benzodiazepines, sedative-hypnotics, antipsychotics, anxiolytics, anticonvulsants, and beta-blockers, are known to cause fatigue. Over-the-counter drugs, including antihistamines, can also have this effect. Additionally, bone marrow transplants and chemotherapy can lead to fatigue and muscle weakness.
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Nervous system conditions
Cervical spondylosis
Age-related changes to the cushioning spinal disks in the neck can cause cervical spondylosis, which puts extra pressure on nerves and results in muscle weakness.
Guillain-Barré syndrome
This rare neurological disorder can cause mild to severe muscle weakness.
Botulism
Botulism is a rare condition caused by exposure to the botulinum toxin, which affects nerves and causes paralysis.
Hemiplegic migraines
These are long-lasting conditions that can cause muscle weakness.
Myasthenia gravis
This uncommon disorder causes muscles to tire rapidly, with a very long recovery time. In extreme cases, patients may be unable to lift their eyelids or speak without slurring their words.
Organophosphate poisoning
Organophosphates are commonly used in farming and as chemical weapons. Poisoning from this substance can cause permanent muscle weakness and paralysis through their effect on nerves.
If you are experiencing any of these symptoms, please seek advice from a qualified healthcare professional.
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Nutritional deficiencies
Vitamin D
Vitamin D is crucial for maintaining bone and muscle strength. It helps the body absorb calcium and phosphorus, which are essential for bone health. A vitamin D deficiency can lead to muscle weakness, bone loss, and an increased risk of fractures. Symptoms of vitamin D deficiency include muscle weakness, bone pain, mood changes, and fatigue. The recommended daily intake of vitamin D for most adults is 15 micrograms, and adults over 70 need 20 micrograms. Vitamin D can be obtained through exposure to sunlight, as well as from dietary sources such as fatty fish (salmon, tuna, mackerel, sardines, and trout), cod liver oil, egg yolks, and fortified foods like milk, soy milk, and breakfast cereals.
Magnesium
Magnesium plays a role in energy production and bone health. While magnesium deficiency is rare in healthy individuals, certain medications and conditions can affect magnesium absorption. Magnesium deficiency can cause fatigue, weakness, loss of appetite, nausea, and, in severe cases, muscle cramps, irregular heart rhythms, and numbness. The recommended daily intake of magnesium for adults ranges from 310 to 420 milligrams, depending on age and sex. Magnesium-rich foods include almonds, cashews, peanuts, spinach, black beans, and edamame.
Vitamin B12
Vitamin B12 is essential for maintaining healthy red blood cells and brain function. A deficiency in vitamin B12 can lead to anemia, fatigue, weakness, numbness, memory loss, and difficulty thinking. Vitamin B12 is commonly found in animal products such as fish, chicken, milk, and yogurt. For vegans and vegetarians, dietary sources include fortified plant-based milk, breakfast cereals, and nutritional yeast. The recommended daily intake of vitamin B12 for adults is 2.4 micrograms.
Iron
Iron is essential for producing red blood cells, which carry oxygen throughout the body. Iron deficiency, also known as anemia, can cause fatigue, weakness, shortness of breath, pale skin, headaches, cold hands and feet, and a swollen tongue. Menstruating women, pregnant women, growing children, and those on vegan or vegetarian diets are at a higher risk of iron deficiency. Iron-rich foods include red meat, eggs, rice, and beans.
Calcium
Calcium is essential for bone health and muscle function. While calcium deficiency may not show clear short-term symptoms, it can lead to osteoporosis, characterized by softer and more fragile bones. The recommended daily intake of calcium for most adults is about 1,000 milligrams, while women over 50 and men over 70 should aim for 1,200 milligrams. Dairy products like milk and yogurt are good sources of calcium, and it can also be found in fortified plant-based milk, dark leafy greens like kale and broccoli, and some breakfast cereals.
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Cancer
Certain types of cancer, such as blood cancers like leukemia, lymphoma, and multiple myeloma, affect the bone marrow, impacting the production of healthy red blood cells. This results in a reduced oxygen supply to the body's tissues, leading to fatigue. Cancers affecting hormone levels, such as breast and prostate cancer, can also cause fatigue. Gastrointestinal cancers, like stomach and colorectal cancer, can affect the body's ability to process and utilise food, leading to nutritional deficiencies and fatigue.
The emotional and mental toll of a cancer diagnosis can also contribute to fatigue. Feelings of anxiety, worry, and fear are common and can lead to insomnia, depression, and loss of appetite, all of which impact energy levels. Additionally, cancer treatments themselves can cause fatigue. Chemotherapy, for example, can affect healthy red blood cells, leading to anemia and fatigue. Radiation therapy, immunotherapy, and surgery can also induce fatigue, often due to the body's increased need for energy to heal and recover.
Managing cancer-related fatigue and muscle weakness involves addressing the underlying causes. A well-balanced diet, adequate hydration, and physical therapy can help reduce fatigue and improve muscle strength. Respiratory therapy may be recommended to address breathing problems contributing to fatigue. Additionally, medications may be prescribed to increase alertness and manage pain, while counselling, stress management, and relaxation techniques can help cope with the emotional aspects of fatigue.
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Frequently asked questions
Extreme fatigue can be caused by a variety of factors, including strenuous exercise, health conditions (such as cancer, stroke, diabetes, anemia, depression, or chronic kidney disease), sleep disorders, or even a recent case of COVID-19.
Muscle weakness can be caused by a variety of conditions, including muscle injuries, nerve issues, sleep disorders, or infectious diseases.
Nervous system issues that can lead to muscle weakness include cervical spondylosis, Guillain-Barré syndrome, and certain types of migraines.
Yes, several autoimmune disorders can cause both muscle weakness and fatigue. These include rheumatoid arthritis, systemic lupus erythematosus, chronic fatigue syndrome, and fibromyalgia.
