I have a dent on the side of my nose and it's never been injured. Is this normal? (Photo)

The nose has multiple parts. The bone of the outside, the bones of the inside and multiple cartilages both inside and outside. Any of them can be twisted or not "fit" with the other components even if no trauma ever occurred. The "dent" that can be seen on this photograph is due to an upper lateral cartilage that is lower in relation to the bone and opposite cartilage.  There appears to be a relative "twist" to the lower part of the nose with more fullness to the left and a relative curvature of the lowest part of the nose to the right. Straightening of the septal cartilage near the tip may allow the nasal tip cartilages to become more aligned. If not, repositioning or straightening the tip and support cartilages may be necessary. Suture techniques and even cartilage grafts can be used as necessary. Every component of the nose in some way is dependant on every other component, and getting them all to fit together cosmetically as well as functionally is the goal of aesthetic rhinoplasty. John Standefer MD

A full  set of pictures are required to make a determination about rhinoplasty. The dent  that is present appears to be a concave and inverted the upper lateral cartilage. To repair this requires a rhinoplasty to harvest septal cartilage and place a spreader graft underneath the concavity.