I currently aggravated my back and I don`t even remember how it was injured, so nothing too traumatic. However it has been reoccurring and most often when I`m at work (retail, standing in one spot). Is it possible to have aggravated my sciatic nerve or damaged the discs when I`m only in my early 20`s.
Yes, it is possible even at a young age, especially if you smoke, are overweight and/or have a lot of relatives with back problems as well.
For more information:
Go to the Spine and Back Health health topic.