Hi,
This is lower back pain may be due strain..
Sometime weakness also can cause difficult to stand long time vit deficiency.
Good Medicines are available to treat pain in homeopathy, so better consult near by any homeopathy doctors.
Next Steps
avoid continuous standing or climbing.
sit straight and use back support.
avoid weight lifting.
take
vitamin b12 food like meat,
liver and take multivitamin vit b and iron