I am feeling a sense of pain on my rib, exactly below the left breast. The pain is only when I move in a particular position; I am able to walk & sit comfortably with no sense of pain. But while I lie down in bed and try to get up or move; it pains a lot. I have applied pain relief sprays and balms; but no improvement. What could cause the pain? Can this be serious ?

A x-ray chest pa view and ecg is advised to the patient. Tab ibuprofen 400 mg sos for pain is advised to the patient.