Waking up with back pain in the morning can be caused by many diseases other than cancer. Depending on the specific situation, it is necessary to consult the relevant departments, such as orthopedics, rheumatology, respiratory medicine, oncology, etc. The most common cause of back pain in the morning is ankylosing spondylitis, which is an immune disorder that causes lesions in the spine and can lead to back pain in the morning, so you can register for orthopedics or rheumatology to improve the relevant examination and then carry out targeted treatment. In addition, back pain in the morning may also be caused by lesions in the thoracic spine, such as herniated discs and muscle strain in the thoracic back, which can be further diagnosed by orthopedic consultation and MRI of the thoracic spine. Pulmonary lesions can also cause back pain in the morning, such as pleurisy and malignant tumors of the lung, such as lung cancer, which can be diagnosed by a respiratory or thoracic surgery department and a CT examination of the lung.