Pericarditis, or pericardial disease, is inflammation of the pericardium, which is the sac that surrounds your heart. A number of conditions can cause pericarditis, including infections, heart attack, trauma to the chest, cancer, autoimmune diseases, and others. Symptoms of pericarditis may include chest pain, fever, and increased heart rate. Depending on the cause of pericarditis, you may or may not need treatment. Follow the links below to find WebMD's comprehensive coverage on how pericarditis is contracted, what it looks like, how to treat it, and much more.