I have a hideous hard dent in my upper right thigh: Can my thigh be corrected? (Photo)

You need a formal consultation this maybe scar tissue or tissue loss of fat that both can be improved.  Best, Dr. Emer.

In my opinion, the simplest way to improve this area would be to use a filler. You can determine if it will be successful by pulling on the edges of the scar and seeing if the scar lifts. If the scar doesn't lift, you may need a simple procedure called subcision to break up the tethers that are holding the scar. Then, Try a short-term filler first  to determine if you are happy with the results. You can then continue the short-term filler or try something like Belafil which will give you permanent results.