It may be due to nerve compression at the Exit point in lower back. It Usually becomes worse with deficiency of Vitamins
B12 and Vitamim D.
Next Steps
Take Colocynth 30 Thrice Daily for 7 days and review after 7 days for follow up, You can consult me in person online through Practo Consult for more help.
Health Tips
Avoid jerking journey and lifting weights bending forward.
Do Salabh Asan and Bhujangasan in morning and evening for 5 minutes each.