I am 19 and have had lower back pain for about roughly 6 months. It was a pretty sudden onset... I have been actively in karate since I was 14. I skate a lot, roller skating and often times, ice skating too- and it hurts but it doesn t stop me from doing so. Been to one doctor(about 4 months ago) and they said I have lost the curve in my spine , but did no xrays.. just gave me meds that did pretty much nothing. Could this spine curve be what s causing my pain? It feels deep in my back, and is a constant ache. I have another appt on Thursday (next week), and am really nervous. It s a different doctor, so I would like to know what I could expect. The pain hasn t gotten any worse over the time period. Just the same... I have a couple of days it hurts worse, if I m leaning or aggressively doing an activity, but the norm doesn t make it feel an worse. If it were a serious disease (I.E. CANCER?!) would my pain be much worse by now? I have no other symptoms other than the lower, left part of my back (from my side to my spine). Also would like to add it hurts the worst when I m sitting and extend my legs out. My mom has a slipped (Herniated) disk... she thinks this could be the problem. ?