I'm a bit confused about where this dent is? Are we talking outside of thigh, inside of thigh or just the front? Is there any discolouration? Could it be your muscles have become more defined? Does it feel like a knot?

 

Its right at the front of my thigh, so i noticed it prob straight away, the other leg isnt like it.
If i feel it its really in dented, i did think it might be where top of my thigh muscle is separated from the top of my leg but though was bit over the top, especially as the other leg is ok :0

 

If there was pain i would say its a muscle contusion where there the muscle has been bashed or strained serverly? get it checked out IMO????

 

There's a few places where muscles/ligaments run over the top of each other which can create 'indented' areas in the skin, have a look and see if the indentation you're seeing tally's up with any of the areas on the image above...

We're very rarely completely symmetrical so it's possible that varying muscles from one leg to the other could explain why you see it in one leg but not the other - though if it does start to cause pain it'd probably make sense to get it checked out!

 

Well had to go to the doctors with my daughter for something, so while i was there had him look at my leg.
He said its a muscle tear, its not causing me any pain, it just feels tight and little achy so i intend to run still on it.
Said was nothing to worry about.
He didnt say dont run on it, as i said its not painfull but i do get the above so ill see how it goes tommorow thanks for advice tho guys

 

Thats a shame H, Good luck for the weekend!