▮ lower back pain

Recently, I have lower back pain. The reason that is, maybe, my part time job and classic ballet. When I work my part time job. I have to carry a lot of heavy luggages. For example, it is milk bottles pet foods and washing materials. Also, I have to keep standing to work as a cashier. When I dance classic ballet, rising my legs that is hard on my lower back. Now, I have a pain just sitting, so I want to know how to cure the lower back pain. Please tell me that. 

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