I'm only in my twenties and have one. Feels like its full of liquid/is just fatty(but not solid enough for just fat), I can feel my first spinal bone at the top, nothing through the hump and then the spinal bones below the hump so its quite weird.
I was just curious if anyone had had one and if there was a way to get rid of them - I've heard massage helps but I'm not sure it actually would or if its the fastest/best way to do it.