9 reasons your lower left back hurts and when to see a doctor

Back pain only on your lower left side may be a sign of an infection, muscle strain, kidney stones, or stress fracture.
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When your back pain isn't harmless but a hidden red flag

There are so many reasons for back pain, and sometimes, it may go beyond just prolonged sitting or sleeping incorrectly. Doctors help understand which ones warrant immediate medical attention, as some ...