Hello, I am 17 years old and I have been having lower back pain for a week now. It gets better when I walk. when I bend or use my back it doesn t hurt but it starts hurting after a couple minutes of bending forward or doing any activity that involved the lower back muscles. I am not sure if this is due to masturbation or weight lifting. I lift weight but i dont engage in any exercises that put alot of strain on my lower back such as deadlifts. I have been keeping it warm for a week but the location of the pain has moved from the right side of my lower back to the left side. I can also hear my back crack when get up in the morning but the cracking does not cause any pain or discomfort.