Help me i have herniated and bulging disc lumbar area sciatica but i don't know why i got severe neck and mid back pain hurts when i breath and cough?

Spine nerve irritate: Due to the myofascial connections, low back spasms can be felt throughout the spine in the mid back and neck a also. You may also have separate nerve irritation problems in those areas. You will need to be evaluated by your family doctor and a specialist in physical medicine and rehabilitation

Cervical spine disc: Many people that have lumbar disease, also have similar finding in the neck which can lead to pain and sensory symptoms in the arms similar to the sciatica you have in your leg. Speak to your md about it and see about getting the neck evaluated.

Herniated Disk: Sneezing and coughing resulting in back pain is a typical finding in someone with a herniated disk. If it does not resolve on its own in a few weeks, i would see your doctor to evaluate the spine further with imaging studies.

Objectify situation: Am troubled by your description, as this suggests a diffuse axial skeletal problem. Need to objectify, and imaging of middle back and neck can help. A physical therapy rehab program and conservative measures employing exercise (maybe swimming) will be beneficial longterm. But evaluate causation for your widespread complaints.