Occasional chest pain when inhaling deeply
This chest pain started at least 4-5 years ago, it was spontaneous, without any obvious reasons, my lower chest sometimes feel painful when i inhale deeply, it occurs even when i'm at home, not when i'm doing strenuous activities. The affected place is not constant, sometime at the lower part of my left chest and sometimes right. I've had blood tests few months ago and there was nothing wrong with me, and i'm not known with any allergies or chronic diseases. Does anyone know what this might be? I tried to search for it online but nothing really fits my condition, and since this pain only occurs occasionally and the duration is short (10-15 mins) i didn't actually cared much about it until now, when i experienced it twice in just 3 days. Any reply is much appreciated.