Hair is falling out all the time: fringe area, male 19.

I'm experiencing a large shed over the past 6 months. In the shower my drain is blocking, and when I dry my hair I can see hairs flying around. Even after the hair is dry, I can see lose hairs dropping on my fringe and falling. Literally it's driving me crazy. Recently I've been getting a really greasy forehead? Could this increase fit around the fringe area? I've also noticed that down the middle of my parting on my scalp it's opened out exposing scalp.