Conclusion

Lower back pain on the left side can be traced to a number of potential causes. Many can be treated with home remedies. But others can be serious. If you have had a recent injury, show signs of an infection, numbness or weakness in your legs, or experience pain that seems connected to your menstrual cycle, immediately call a doctor.
References:
[1] https://my.clevelandclinic.org/health/diseases/12792-sciatica
[2] https://www.arthritis.org/diseases/osteoarthritis
[3] https://www.aans.org/Patients/Neurosurgical-Conditions-and-Treatments/Herniated-Disc
[4] https://www.mayoclinic.org/diseases-conditions/sacroiliitis/symptoms-causes/syc-20350747
[5] https://www.nhs.uk/conditions/endometriosis/
[6] https://www.mayoclinic.org/diseases-conditions/diarrhea/symptoms-causes/syc-20352241
[7] https://www.mayoclinic.org/diseases-conditions/infertility/symptoms-causes/syc-20354317
[8] https://my.clevelandclinic.org/health/symptoms/10880-fever
[9] https://www.webmd.com/digestive-disorders/digestive-diseases-nausea-vomiting











