Hair Just Started Thinning Over the Past 3 Weeks

Hi, I am 18 years old and my hair suddenly seems to have gotten really thin over the last 3 or so weeks. I’m worried about this, although nobody seems to have noticed it yet, and i was beginning to wonder if its normal to lose noticable amounts of hair in such a small amount of time? The thinning is mainly down the centre of the top of my head (although there is no receding or evidence of a pattern) and depending on the light you can see my scalp right through it. A month ago i was complaing about how thick my hair was and getting it razor cut to thin it out! My dad is pretty bald but i don’t think he started till at least his mid 20’s and it progressed slowly till his mid 30’s. My maternal grandfather has a full head of hair but i know this often doesn’t make a difference. I appreciate any explanation or advice you can give me.

The answer to this is to get your scalp examined and your hair mapped out for miniaturization and that will tell you if you have started the balding process that runs in your family. You need to know for peace of mind, otherwise, you will become obsessed over every hair that falls out and constantly look in the mirror for the assurance it can not give you. There’s not much more advice I’d be able to give online without examining you first.