I am 17 years old, 173 cm high, 72 kg weight. The problems started 10th of January when i felt strong pain in my chest, followed by temperature the next day. For 20 days I suffered without anyone knowing what's wrong with me, and then, finally, I was diagnosed with pericarditis. My CRP was 174 then. I took Longacef for 7 days, it seemed OK, but after 3 days it came back. Then they gave me Prednisone with Aspirine wich I took for 15 days. I was fine for the next month, and then it came back again, with CRP 214. Prednisone with Longacef for 10 days, and now I've been taking prednisone for 2 months, with decreasing doses for up to 5mg. Yesterday my doctor cancelled the steroids.

Summarized question: What causes unresolved pericarditis?