I have a sharp pain in my lower rib cage on the left side whenever I breathe. It started suddenly while I was sleeping in the evening. Should I be worried about this?
The sudden onset of left lower rib cage pain when breathing may indicate costochondritis, pneumothorax, pleurisy, or muscle strain; however, it's essential to consult a doctor promptly to rule out any underlying serious conditions, especially if the pain worsens, is severe, or accompanied by difficulty breathing, cough, or fever.