For back pain caused by rheumatism, be alert to ankylosing spondylitis, which is characterized by low back pain that is mainly aggravated after rest and can be relieved by activity, so many patients have increased back pain after sleeping in the morning, but it gets better after a while of activity. If you have back pain of this nature, further investigation of HLA-B27 and inflammatory indicators, blood sedimentation and C-reactive protein is recommended, as well as imaging tests. If the low back pain is short-lived, an MRI of the sacroiliac joint can be done. If the pain is severe, it is recommended to temporarily use non-steroidal pain medication, such as Fotarolim extended-release tablets for pain relief.