Sandy feeling on scalp

[sandyhead]

Hi,

I've been monitoring my own hair loss situation over the past couple of years. My hairline has receded a little (though not drastically over this time). Recently my hair has been thinning though quite rapidly mostly at the frontal hairline. I'm 29. Something i've noticed though that doesn't seem to match other peoples experiences is that my hair feels like its full of sand. Like at the base of my hair follicles it feels like it's plugged and when I scratch It feels hard and grainy and I often get some hair fall with it. Is this DHT ?