Can you do anything while treating pericarditis?

Depends: Not sure whether you are asking about activity during treatment, but if you are, than the answer is yes, up to a point. Pericarditis is an inflammation of the lining around the heart and it is important not to overstress the heart during the course of the illness, otherwise it may provoke potentially serious arrhythmias. Most low strenuous activities of daily living can be done during treatment.

Depends: Patient or surgeon? ... If patient and being treated medically, usually no restrictions from activity ... If surgically treated, then usually restricted from straining or strenuous activity, from heavy lifting, from driving while taking narcotics or having significant pain, and from bath tubs or pools until wounds have completely healed ...