Hello, I've been experiencing mild and prolonged pain in the chest region ( somewhere near lower left side of the chest ) . I'm experiencing this from the last 2 days . There are 2 instances of sudden severe pain for about 5-6 seconds ( something like a shock ) . I experienced similar symptoms few months ago . I thought it is due to some muscle stressed during sleep. It is now repeated again . Kindly let me know the possible reasons for this so that I can proceed further. Your advice would be of great help to me . Thank you.