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Can myositis symptoms come and go?

Author

Sarah Smith

Published Jan 09, 2026

The following are some symptoms of polymyositis. These symptoms may come and go: Muscle weakness: This is the most common symptom. The muscles involved usually are those closest to the trunk of the body, and the onset of weakness is usually gradual, occurring over 3 to 6 months or rarely the symptoms come on rapidly.

Does myositis have flare ups?

Yes. It is estimated that 15% of people with myositis may experience one flare. A larger group experiences flares that are separated by periods of disease inactivity. The largest group; however, experiences flares, separated by periods of relatively mild disease activity.

How long does myositis flare up last?

They ease inflammation in the body. Symptoms usually get better within 4 to 6 weeks. Your healthcare provider may lower the dose of steroids after that to ease side effects. Some people may need to take steroids ongoing to manage the disease and reduce symptoms.

What does a myositis flare up feel like?

Myositis is the name for a group of rare conditions. The main symptoms are weak, painful or aching muscles. This usually gets worse, slowly over time. You may also trip or fall a lot, and be very tired after walking or standing.

What causes myositis flare ups?

Causes. Anything that causes swelling in the muscles – including injury, vigorous exercise, infection or exposure to some viruses (the common cold and flu) – can trigger myositis. Certain medications (such as statins) and illegal drugs (like cocaine) can cause myositis, too.

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What are the first signs of myositis?

Early symptoms in patients with myositis include:

  • Difficulty standing up from a seated position.
  • Difficulty climbing stairs.
  • Difficulty lifting the arms.
  • Fatigue after standing or walking a long time.
  • Trouble swallowing or breathing.
  • Muscle pain that does not subside within a few weeks.

How do I know if I have myositis?

The main symptom of myositis is muscle weakness. The weakness may be noticeable or may only be found with testing. Muscle pain (myalgias) may or may not be present. Dermatomyositis, polymyositis, and other inflammatory myositis conditions tend to cause weakness that gets worse slowly over weeks or months.

How quickly does myositis progress?

Patients diagnosed with IBM progress to disability usually over a period of years. The older the age of onset is, the faster the loss of strength and mobility. By 15 years, most patients require assistance with basic daily routines, and some become wheelchair- bound or bedridden.

What is the difference between myositis and polymyositis?

Myositis means inflammation of the muscles that you use to move your body. An injury, infection, or autoimmune disease can cause it. Two specific kinds are polymyositis and dermatomyositis. Polymyositis causes muscle weakness, usually in the muscles closest to the trunk of your body.

What autoimmune disease causes myositis?

Autoimmune myositis causes inflammation and weakness in the muscles (polymyositis) or in the skin and muscles (dermatomyositis).
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There are four types of autoimmune myositis:

  • Polymyositis.
  • Dermatomyositis.
  • Necrotizing immune-mediated myopathies.
  • Inclusion body myositis.

Can myositis go away on its own?

Like other rheumatic diseases, myositis is unlikely to go away on its own. But with proper treatment and management these chronic diseases can be brought under control. At present there is no cure for myositis. A person with myositis will need to manage the condition and to adjust to the changes it brings.

Can myositis go into remission?

Some patients experience complete remission while others experience partial remission.

What does muscle inflammation feel like?

Inflammation damages the muscle fibers, which causes weakness, and may affect the arteries and blood vessels that pass through muscle. Other symptoms include fatigue after walking or standing, frequent episodes of tripping or falling, and difficulty swallowing or breathing.

Does prednisone help myositis?

Prednisone, a corticosteroid, is usually the first line of treatment for Myositis. Other medications that help reduce inflammation and suppress the immune system are usually added while decreasing prednisone. Prednisone is usually a fast acting treatment that we call a “wonder drug” but has many side-effects.

What is the life expectancy of someone with myositis?

While sporadic inclusion body myositis is a progressive disease, life expectancy for those with sIBM is usually the same as for those without the disease. In fact, IBM patients usually don't die from the disease, but from complications (often preventable) that are associated with it.

Is there a blood test for myositis?

After a careful history and physical exam to document the pattern of weakness in muscles, a doctor who suspects myositis likely will order a blood test to check the level of creatine kinase (CK), an enzyme that leaks out of muscle fibers when the fibers are being damaged. In PM, the CK level is usually very high.

Can Covid cause myositis?

Recent findings: COVID-19 is associated with a viral myositis attributable to direct myocyte invasion or induction of autoimmunity. COVID-19-induced myositis may be varied in presentation, from typical dermatomyositis to rhabdomyolysis, and a paraspinal affliction with back pain.

Why would every muscle in my body hurt?

You may also have aches in your fascia, which is the soft tissue between your muscles, bones, and organs. If you feel like all of the muscles in your body hurt, that's a sign of infection or illness. Health conditions that cause whole body aches include flu, COVID-19, fibromyalgia, and autoimmune disorders.

Does myositis come on suddenly?

The muscle weakness may appear suddenly and progress over weeks to months. Additionally, the degree of muscle weakness may fluctuate over time as well.

Does exercise help myositis?

Physical exercise has been shown to reduce inflammation, reduce fatigue, increase stamina, and build muscle, even in patients with myositis. Indeed, exercise is currently the only treatment recommendation for patients with inclusion body myositis.

What type of doctor should I see for myositis?

Many new patients have difficulty finding health care practitioners who know about myositis. Patients with dermatomyositis, polymyositis, or necrotizing myopathy are usually treated by rheumatologists. Those with dermatomyositis may also work with a dermatologist. Those with IBM are often treated by neurologists.

Can you see muscle inflammation on an MRI?

MRI is sensitive in detecting muscle inflammation, but it is not specific to a diagnosis of myositis because muscular dystrophies and other myopathies may have associated edema on MRI [2]. The signal changes on imaging need to be interpreted in the context of the clinical setting.

What are the 5 classic signs of inflammation?

Inflammation is how your body responds to infection. Five cardinal signs characterize this response: pain, heat, redness, swelling, and loss of function.

Is myositis an autoimmune disease?

Myositis (my-o-SY-tis) is a rare type of autoimmune disease that inflames and weakens muscle fibers. Autoimmune diseases occur when the body's own immune system attacks itself. In the case of myositis, the immune system attacks healthy muscle tissue, which results in inflammation, swelling, pain, and eventual weakness.

How can I treat myositis naturally?

Omega-3s. These are important as they may reduce inflammation. Good sources include fatty fish (salmon, mackerel, anchovies, sardines, and herring), avocados, ground flaxseed, chia seeds, hemp hearts, walnuts, pecans, canola oil, walnut oil, and flaxseed oil.