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Myositis is inflammation of the muscles along with muscle weakness.  An inflammatory myopathy, myositis is an autoimmune disease.  It has no known cause and can be triggered by exercise, chronic disease, some medication, injury and even infection.  There are different types of myositis that we treat at Sunridge Medical Center.

Dermatomyositis (DM) is myositis caused by swelling of the blood vessels, directly under the skin and in the muscles and often starts with a red and purple colored patchy, rash on the skin of the knees, elbows, knuckles of fingers and toes, face (including the eyelids) chest and back.  Some patients have calcinosis which is hard bumps under the skin.  DM affects more women than men but can occur at any age and is more prevalent in patients of African descent.  Patients may begin to experience muscle weakness near the core of their body, but not all patients experience muscle pain.

Common Symptoms of Dermatomyositis:

  • Red and purple colored rash on knees, elbows, knuckles of fingers and toes, face (including the eyelids) chest and back.
  • Inflamed fingernail beds.
  • Dry, scaly, rough or thickened skin.
  • Fatigue.
  • Struggle to rise from a flat or seated position.
  • Muscle weakness in the hips, neck, shoulders and back.
  • Hoarseness or changes in voice.
  • Choking and trouble with swallowing.

Inclusion-Body Myositis

Inclusion-Body Myositis (IBM) is a slowly progressive disease caused by inflammation of the muscles leading to weakness and wasting of muscles including the legs and arms of a patient.  Typically this disease occurs in men, but in women to a lesser extent who are older than 50 years old.

Common Symptoms of Inclusion-Body Myositis:

  • Clumsiness, tripping, and falling.
  • Difficulty in climbing stairs.
  • Struggle to rise from a flat or seated position.
  • Droopy foot.
  • Evident shrinking of the thigh muscles.
  • Hand weakness and difficulty with hand grip.
  • Trouble swallowing.
  • Muscular Pain.


Polymyositis (PM) is meaning many muscle weakness is a myositis that can have a sudden onset or take weeks or months to manifest. Patients begin to experience muscle weakness near the core of their body which can progress outward to hands and toes.  Not all, but some patients experience muscular pain and discomfort, have difficulty breathing and struggle to swallow.  Many patients with PM have an additional autoimmune disease(s).  PM affects patients over the age of 20 years old and is more prevalent in women than men.

Common Symptoms of Polymyositis:

  • Sudden muscle weakness.
  • Gradual muscle weakness.
  • Clumsiness, tripping, and falling.
  • Fatigue.
  • Breathing problems and chronic dry cough.
  • Finger and toe weakness.
  • Skin on hands may be callused, thick and hard.


For answers to your questions or to make an appointment, call us toll-free at 866-740-3638 to speak with our Patient Care Team.

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Still Have Questions? That’s okay, we know that navigating a new course for your health is never easy, especially with all the information there is out there to have to sort through and process. That is why our Patient Care Representatives strive to provide you with as much knowledge as they possible can so that you can make the best and most informed decisions for you and your loved ones. Start by filling out the form below or just call us toll free at (800) 923-7878. There is no obligation, so please go ahead and ask away, we are always happy to help!


    14200 N Northsight Blvd Suite 160
    Scottsdale, AZ 85254 USA


    800-923-7878 (toll free)
    480-659-9135 (local)

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