Introduction

Polymyalgia Rheumatica (PMR) is a condition that causes muscle pain and stiffness, mainly in the shoulders, hips, neck, and upper arms.¹ It is considered an inflammatory disorder, meaning that the body's immune system mistakenly attacks healthy tissues, leading to discomfort and reduced mobility.¹ If you are experiencing muscle pain or stiffness, especially in these areas, it is essential to seek medical attention to determine if PMR could be the cause. Early diagnosis and treatment can help alleviate symptoms and improve your quality of life.

Symptoms

There are several symptoms related to PMR:¹

• Muscle pain and stiffness: The main symptom of PMR is widespread muscle pain and stiffness, typically affecting both sides of the body symmetrically. This pain and stiffness are often worst in the shoulders, hips, neck, and upper arms. Individuals with PMR may find it challenging to perform daily activities involving movement, such as getting dressed, lifting objects, or raising their arms
• Morning stiffness: Many people with PMR experience significant stiffness, particularly in the morning after waking up or after long periods of inactivity. This stiffness can last for several hours, making it difficult to get out of bed or perform activities requiring mobility
• Fatigue: Fatigue is a common symptom of PMR that accompanies muscle pain and stiffness. Individuals may feel unusually tired or lacking in energy, even after getting enough rest. Fatigue can impact daily functioning and contribute to feelings of overall sickness
• Limited range of motion: The muscle stiffness and pain in the shoulders, hips, and neck can lead to a reduced range of motion in these areas. This reduced range of motion can affect mobility and make it challenging to perform tasks that require reaching, lifting, or turning
• Physical weakness: Some individuals with PMR may experience weakness or a sensation of heaviness in the affected muscles. This weakness can contribute to difficulty with activities that require muscle strength, such as climbing stairs or lifting objects
• Low-grade fever: In some cases, PMR may be accompanied by a low-grade fever, typically less than 38°C. This fever is a nonspecific symptom and does not always occur in individuals with PMR

Additional symptoms of PMR may include:¹

• Loss of appetite
• Unintentional weight loss
• Depression or mood changes 

These additional symptoms can vary in severity and may not be present in every individual with PMR. It is essential to note that the severity and combination of all the symptoms can vary among individuals with PMR, however, if you think that you have PMR or any concern about it, seek medical advice from a healthcare professional. 

Diagnosis

Diagnosing PMR involves a comprehensive evaluation by a healthcare professional, typically a rheumatologist or primary care physician. The diagnosis of PMR is primarily based on clinical findings, including the characteristic symptoms of muscle pain, stiffness, and limited range of motion, particularly in the shoulders, hips, and neck. Additionally, healthcare providers may consider the individual's age, as PMR most commonly affects individuals over the age of 50, and the presence of other associated symptoms, such as fatigue or low-grade fever.¹

Laboratory tests may be ordered to support the diagnosis and rule out other potential causes of symptoms. 

These tests may include:^1,2

• Blood tests - to measure markers of inflammation, such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) levels, which are often elevated in individuals with PMR
• Imaging studies (ultrasound or MRIs) - to assess for inflammation or structural changes in the affected muscles and joints

While there is no single definitive test for PMR, a combination of clinical evaluation, laboratory tests, and imaging studies can help healthcare providers make an accurate diagnosis and initiate appropriate treatment.³ If PMR is suspected, prompt diagnosis and treatment are essential to alleviate symptoms and prevent complications.

Treatment

Once you receive a PMR diagnosis, the primary aim of treating PMR is to relieve your symptoms and improve your quality of life. Treatment typically involves the use of corticosteroid medications, such as prednisone, which work to reduce inflammation and alleviate pain and stiffness in the affected muscles and joints.⁴ 

You may be prescribed an initial high dose of corticosteroids to rapidly control your symptoms, followed by a gradual tapering of the dose over time to achieve the lowest effective dose that maintains symptom relief. Most individuals will need a course of steroid treatment that lasts for 12 months to 2 years to prevent their symptoms from returning.⁴

It is important for you to closely follow your healthcare provider’s recommendations regarding medication dosage and tapering schedule to minimise the risk of side effects that occur from long-term corticosteroid use. Some symptoms to look out for are weight gain, osteoporosis, and increased risk of infections. 

In some cases, other medications, such as nonsteroidal anti-inflammatory drugs (NSAIDs) or disease-modifying antirheumatic drugs (DMARDs), may be prescribed in combination with corticosteroids to enhance symptom control or to reduce the need for prolonged corticosteroid therapy.⁴

In addition to medication, there are lifestyle modifications that can be done to help manage symptoms and improve overall well-being.⁴ These include doing regular exercise, maintaining a healthy diet, and getting adequate rest. Ensure that you closely monitor your symptoms to watch out for potential side effects and assess how you are responding to treatment. 

Complications and long-term outlook

PMR is a condition that generally responds well to treatment and does not cause permanent damage, however, there are potential complications and long-term considerations to be aware of. 

Prolonged use of corticosteroid medications, which are the main medication used in treatment for PMR, can lead to a range of side effects, including weight gain, high blood pressure, osteoporosis (bone thinning), increased risk of infections, and mood changes. Additionally, corticosteroids may mask symptoms of other underlying conditions, such as giant cell arteritis (a related inflammatory condition affecting the blood vessels), which can delay diagnosis and appropriate treatment.⁵

Furthermore, some individuals with PMR may experience flare-ups of symptoms or develop other autoimmune conditions over time, necessitating ongoing monitoring and management by healthcare providers. 

Despite these potential challenges, with proper treatment and regular follow-up care, many individuals with PMR can achieve long-term symptom control and maintain a good quality of life. Individuals with PMR need to work closely with their healthcare providers to monitor for complications, manage the side effects of medications, and make any necessary adjustments to the treatment plan to ensure optimal outcomes over the long term.

Summary

Polymyalgia Rheumatica (PMR) is a condition characterised by muscle pain and stiffness, typically affecting the shoulders, neck, and hips. The symptoms of PMR can significantly impact daily functioning and quality of life, but prompt diagnosis and treatment with corticosteroid medications can help alleviate symptoms and improve overall well-being. Diagnosis of PMR is based on a combination of clinical evaluation, blood tests, and imaging studies to rule out other potential causes of symptoms. While corticosteroids are effective in managing PMR symptoms, they may be associated with side effects and long-term complications, necessitating careful monitoring and management by healthcare providers. Despite these challenges, many individuals with PMR are able to achieve long-term symptom control and maintain a good quality of life with appropriate treatment and ongoing medical care.

FAQs

What other conditions can mimic the symptoms of PMR?

Conditions such as rheumatoid arthritis, osteoarthritis, fibromyalgia, and certain infections may also have symptoms that are similar to PMR.⁶ Proper diagnosis requires a thorough evaluation by a healthcare professional to differentiate PMR from these other conditions.

Are there specific risk factors for developing PMR?

The exact cause of PMR is unknown, however, there are several factors that are thought to increase the risk of developing the condition.⁶ These include age (typically over 50 years old), genetic predisposition, gender (people assigned female at birth are more likely to get PMR), and environmental triggers. 

Can PMR affect other parts of the body besides muscles and joints?

In addition to symptoms in your muscles and joints, PMR may sometimes be associated with other systemic manifestations such as temporal arteritis (inflammation of the arteries in the head), which can lead to vision problems if left untreated.⁵

Is there a cure for PMR?

PMR is typically managed with medications like corticosteroids to reduce inflammation and alleviate symptoms. While treatment can effectively control symptoms, there is no cure for PMR, and relapses may occur if medications are tapered off too quickly.

How long does it take to get a diagnosis of PMR?

The diagnostic process for PMR can vary depending on individual circumstances, but it typically involves a series of evaluations by healthcare providers, including physical examination, blood tests, and imaging studies. In some cases, diagnosis may take several weeks or months to confirm.

Can PMR lead to complications if left untreated?

If left untreated, PMR can lead to significant disability and complications such as joint damage, loss of function, and decreased quality of life. Additionally, PMR may sometimes be associated with other serious conditions like giant cell arteritis, which requires prompt treatment to prevent complications such as vision loss.^5,6

Is PMR related to other autoimmune diseases?

While the exact relationship between PMR and other autoimmune diseases is not fully understood, there is some evidence to suggest that PMR may be associated with an increased risk of developing conditions like rheumatoid arthritis or giant cell arteritis. However, further research is needed to elucidate these potential connections.

Can PMR symptoms be managed without medication?

While medication is typically necessary to effectively manage PMR symptoms, lifestyle modifications such as regular exercise, adequate rest, and stress management techniques may help improve overall well-being and complement medical treatment. However, consult with your healthcare provider before you make any changes to your lifestyle, or if you have any concerns about taking medication.