深夜2点左右，胸 behind breast bone, closer to the back, 会有dull pain

来源: 于 2019-11-22 06:35:46 [旧帖] [给我悄悄话] 本文已被阅读：次

During the day, I am perfectly fine. No shortness of breath, no fever, nothing.

为啥呢？