Thick hair is something every girl desires but is difficult to achieve. Although the below hack will not permanently thicken your hair it can be used to FAKE the look.
Firstly find an eyeshadow which is the closest match to your hair colour.
Make your parting as desired, or brush hair back if no parting is required.
Lastly dust the eyeshadow along your parting and shade your scalp slightly. Alternatively if you are not parting your hair then the eyeshadow can be applied along the hairline to achieve the same results.
All done, simple as that!