What is your profession? How much do you require to sit and how do you sit? The pain seems to be of muscles due to poor and continued sitting. Such sitting leads to weakenss and stiffness of the muscles of lower back and thighs. When one tries to walk on such muscles then you get pain and then one rests more to avoid pain thereby increasing the problem.
Next Steps
ergonomic sitting and working atmosphere such that back is in neutral alignment. frequent breaks from sitting or standing or lying. stretching exercises
Health Tips
we can do a teleconsultation if you want