Hi,
The MRI is not suggestive of any major issue. So do not panic!
To guide you further please tell us about your physical activity levels, your work profile etc. You weight about 80kgs, if there was any sudden increase in weight you are ought to have the disc bulge.. but even without that theory, a significant muscle imbalance can lead to this issue.
Also the dimples you are talking about are a normal phenomenon.. they tend to be more prominent in standing than in sitting.. the muscle imbalances could derange your SI joint making the dimples prominent in sitting.
Next Steps
guided exercises can help you get better.
please reach out to me for further assistance.
we can try this at home itself.
Health Tips
increase physical activity if the pain is not a constant phenomenon!