
Muscle aches, or myalgia, can be caused by various factors, including overexertion, exercise, dehydration, stress, and underlying medical conditions. In some cases, muscle aches may also be accompanied by a fever. A fever is a body temperature higher than 100.4 °F and is often a sign of an infection, such as a cold, flu, or bacterial infection. When the body is fighting an infection, it releases inflammatory chemicals, which can cause muscle aches and fever. Additionally, certain medications and chronic conditions can also lead to muscle aches and fever. While muscle aches and fever can be concerning, they are often treatable with rest, hydration, and over-the-counter medications.
| Characteristics | Values |
|---|---|
| Muscle aches with fever | Caused by viral infections such as flu, COVID-19, or HIV |
| Muscle aches without fever | Caused by dehydration, stress, cold weather, chronic health conditions, or bacterial infections |
| Treatment for muscle aches with fever | Over-the-counter medications like ibuprofen, naproxen, acetaminophen, or aspirin |
| Treatment for muscle aches without fever | Rest, warm bath or shower, warm compress, heating pads, hot water bottle, gentle exercises, and hydration |
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What You'll Learn

Dehydration
The symptoms of dehydration can vary by age and include muscle cramps, heat intolerance or chills, constipation, and dark-colored urine. Dehydration can also cause a rapid heart rate, sunken eyes or cheeks, fatigue, and confusion. In severe cases, dehydration can lead to life-threatening complications such as kidney stones, kidney failure, and heatstroke.
To prevent dehydration, it is important to drink enough water, especially in hot weather or during physical activity when the body loses fluids through sweating. The recommended daily water intake is 6-8 glasses. However, individuals should adjust this amount based on their level of physical activity and their environment.
If you are experiencing muscle aches and suspect dehydration, increasing your fluid intake can help alleviate these symptoms. Rest, gentle stretches, and heat therapy can also help reduce muscle pain associated with dehydration.
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Stress
While muscle aches and fever are commonly associated with viral infections like the flu, they can also be caused by stress. Stress is often viewed as a mental health condition, but it can also manifest physically in the body. When stressed, the body becomes more susceptible to infection and inflammation, leading to aches and pains. Stress can cause muscle aches, headaches, and shaking. It also impairs the body's ability to fight off disease, making it more challenging to combat inflammation or infection.
In some cases, muscle aches may be due to overexertion or exercise. Resting, discontinuing the strenuous activity, and applying ice to the affected area can help alleviate the discomfort. Over-the-counter anti-inflammatory medications can also help manage pain, inflammation, and fever. However, it is important to note that fever-reducing medications should be avoided unless the fever is high, as a mild fever is a natural bodily response to infection.
While muscle aches caused by stress can be managed through self-care and lifestyle changes, it is important to seek medical attention if the aches are accompanied by other concerning symptoms, such as a very high fever or difficulty breathing.
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Infection
Fever and muscle aches are common symptoms of an infection. When the body is infected with a virus, the immune system works to fight the infection, and this could lead to muscle inflammation and weakness, called myositis, or joint and muscle pain, called myalgia.
Orthopaedic surgeon Thomas Donaldson, MD, chair of orthopaedics at Loma Linda University Health, explains that inflammation can cause pain similar to mild arthritis. He adds that while these aches and pains are temporary, if symptoms are ongoing or worsening, there may be a more significant underlying issue.
Full-body aches often accompany a fever. As a higher body temperature causes shivering, muscles tense up and may begin to ache. Fevers are a sign that the body is fighting off an infection.
Infectious diseases that cause flu-like symptoms such as fever, chills, and body aches include RSV, COVID-19, pneumonia, and influenza. Other possible causes of body aches include stress, certain chronic illnesses, and exercise.
To reduce a fever and accompanying muscle aches, it is recommended to take fever-reducing pain medicine, use a cool bath, and dress in lightweight, breathable clothing. Getting plenty of sleep and staying hydrated are also important when the body is fighting an infection.
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Exercise
Gentle exercises like stretching, Pilates, yoga, or walking can help reduce muscle aches and increase blood flow to the body. However, it is important not to over-exert yourself as overly strenuous exercise can cause muscle strain and body aches. If you are experiencing aches and pains after exercise, rest and a warm bath or shower can help relax your muscles.
If you are experiencing muscle aches alongside a fever, this could be a sign of an infection, such as a cold, the flu, COVID-19, or Lyme disease. In these cases, your body may raise its temperature in an attempt to kill the virus, causing a fever. It is recommended that you seek medical advice if your fever does not reduce after a few days.
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Underlying medical conditions
Muscle aches, or myalgia, can be a symptom of several underlying medical conditions. These include bacterial infections such as strep throat, pneumonia, and Lyme disease, which can result in body aches or chills with or without a fever. Certain antibiotics used to treat bacterial infections may also cause muscle aches. Chronic conditions such as polymyalgia rheumatica, an inflammatory condition causing muscle pain, and endometriosis, a gynecological condition, can also lead to muscle aches.
Viral infections, such as the flu, COVID-19, and HIV, commonly cause muscle aches in addition to fever. This is due to the body's immune response, which includes the production of cytokines, leading to inflammation in the muscles and joints. In some cases, prolonged viral symptoms can progress into bacterial infections like bronchitis or pneumonia, which may further contribute to muscle aches and fever.
Autoimmune conditions, such as fibromyalgia, can also be a cause of muscle aches. Additionally, certain medications, such as statins used to control high cholesterol, have been linked to muscle pain in a significant percentage of patients. Nutritional deficiencies, particularly a lack of vitamin D, can also lead to muscle aches as this nutrient is essential for proper muscle function.
While muscle aches can be a symptom of various medical conditions, it's important to note that they can also arise from other factors such as dehydration, overexertion, exercise, stress, and cold weather. Identifying the underlying cause is crucial to determine the appropriate treatment or management strategy for muscle aches.
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Frequently asked questions
Muscle aches can be caused by a fever. However, it is usually the other way around, with fever causing muscle ache. This is because a fever is a sign that your body is fighting off an infection.
Other symptoms of fever include chills, fatigue, sweating, flushed complexion, and hot skin.
Common causes of muscle aches include dehydration, overexertion, exercise, stress, and underlying medical conditions.
To treat muscle aches caused by fever, you can take over-the-counter medications like ibuprofen, naproxen, acetaminophen, or aspirin. It is also recommended to rest and drink plenty of fluids.
Yes, gentle exercises like stretching, yoga, and walking can help reduce muscle aches. Applying heat through a warm bath, shower, compress, heating pad, or hot water bottle can also help relax the muscles.











































