Myocarditis is when the wall of the heart muscle becomes inflamed, usually due to a viral infection. A severe case can keep your heart from working as it should. 

Myocarditis has many causes:

  • Viruses: Some of these viruses include common colds, including Influenza or Coronavirus.
  • Bacteria: Some of these infections include “staph infections,” “strep infections,” and Lyme disease.
  • Parasites: Some of these include those found in cat poop and insect bites.
  • Fungus: Some of these infections include molds, yeast, and fungi.
  • Allergies: These may be reactions to medications or recreational drugs.
  • Chemicals: This includes reactions to things like radiation, radiotherapy, or other chemicals. 

For more information, see the handout below:

An Introduction to Myocarditis