은하수
I've been experiencing frequent back pain lately, and I'm worried. It's not a sudden, severe pain, but I often feel a stiffness and discomfort in my lower back when I stand up after sitting or staying in the same position for a long time. It's especially worse in the morning or after a long day of activity. I usually sit for long periods of time and exercise regularly. I'm wondering if this is simply muscle fatigue, or if it could be an early sign of a herniated disc or other back problem.
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