Yesterday when I woke up, I saw my pillow full of hair. I am really worried as I donât know for what reason I am loosing hair in such a drastic way. Whenever I touch my hair there are lot of hair that fall on my hand. I was wondering if anyone could tell me the reason of sudden hair loss. I always take healthy diet and I am not allergic to anything. Please tell me what could be the reason for my hair loss. Thank you.