This is may be due to Muscle strain or Lumbar disc problem
Better visit nearest Physiotherapy clinic for Ultrasound therapy and IFT for 5-7 days
Use Hot pack Application for 10-15 mins 2-3 times a day
Apply pain relief ointment for 3-4 times a day
Start Lumbar strengthening exercises
Lumbar Stretching Exercises
Core Strengthening Exercises
Next Steps
Visit Nearest Physiotherapy clinic for complete assessment and treatment
Health Tips
Maintaine Ergonomic posture while working in front of a computer
Place a pillow under the knees while sleeping on the back
Place a pillow between the legs while sleeping on side ways
Use flat / hard bed for sleeping