Hi there!
Well, without a clinical evaluation it would be difficult to determine the cause of the pain. Possibilities that may need to be considered include spinal issues such as degeneration, disc prolapse etc; neuro-muscular causes, postural issues, injuries, contusion/ bruises, growths/ masses etc. It would be best to have this evaluated by a primary care physician or an orthopedician for an accurate diagnosis and appropriate management.
Hope this is helpful.
Take care!
Thank you so much. It is very helpful.