Why does my back aches frequently im only 17 yrs.old?

Various reasons: Unfortunately, your concern requires more information. While most backaches are fairly straightforward in their nature, there are some that require special tests/studies to arrive to the correct diagnosis.

Backaches: Depends on what is causing it, need more information, how long have you had it, is it progressing, what exactly do you feel, any tingling, numbness, loss of sensations in any part of your body, any weakness in your muscles, any gait issues, feeling of pain shooting down the back of your leg, any loss of bowel or bladder control?Failure to seek treatment can become serious and cause permanent damage.