MRI report. From chronic back pain.

Mild bilateral sacroiliitis is an inflammatory condition that affects the sacroiliac joint, which is the joint connecting the sacrum and the ilium bones in the lower back. This can cause chronic back pain that may be worsened by sitting or standing for prolonged periods, and may also be accompanied by stiffness and restricted mobility. Treatment options for sacroiliitis may include nonsteroidal anti-inflammatory drugs (NSAIDs), physical therapy, steroid injections, and in severe cases, surgery. Radiofrequency nerve ablation is a minimally invasive procedure that can be used to provide pain relief for patients with chronic sacroiliac joint pain that has not responded to other treatments. In this procedure, a special needle is inserted into the affected area and a small electrical current is used to heat up the nerves that transmit pain signals from the joint to the brain. This effectively "turns off" these nerves, providing pain relief that can last for several months or more. However, the best course of treatment will depend on the severity of your condition, your individual symptoms, and other factors such as your medical history and overall health. It is recommended to consult with a healthcare professional to discuss the best course of action for your particular case.

Do some blood test to rule out ankylosing spondylosis