<s>[INST] I have been experiencing stabbing pain in my chest - lower center and pronounced when I sneeze or cough and now it s becoming steady. Also enhanced by sudden shifting, getting up and sitting down and sudden arm movements. I m about 2 days into this. Has nothing to do with eating as it s there all night. [/INST] Thanks for your question on Chat Doctor. I can understand your situation and problem. By your history and description, possibility of musculoskeletal pain is more. But better to first rule out pleurisy (inflammation of pleura) as this can also cause stabbing chest pain on coughing and sneezing. Pleurisy can be due to pneumonia, pleural effusion, tuberculosis etc. So get done chest x-ray. If chest x-ray is normal than no need to worry about pleurisy. You are having musculoskeletal pain only. So avoid movements causing pain. Avoid bad postures in sleep. Avoid heavyweight lifting and strenuous exercise. Start painkiller and muscle relaxant Chat Doctor.  Apply warm water pad on affected site. Don't worry, you will be alright in 1-2 weeks. Hope I have solved your query. Wish you good health. Thanks. </s>