Doctors can you tell me why does my neck hurt when i laugh, cough and breathe deeply?

Herniated Disk: Coughing and laughing that results in pain suggests a herniated disk, this will not generally be anything that will harm you in the long run. That said, if there is any perceived weakness or ascending numbness in the legs or arms, that would be of concern. If you are worried I would suggest you see your doctor for further workup with imaging like Xray or MRI.