However, younger people may experience these things, too. But it doesn't have to be anything critical if it does.
Here are some facts behind hair loss and how it may or may not affect you:
Why am I losing hair?
Just like your skin sheds to make room for a new stratum, your hair also leaves the scalp. This occurs in a cycle, in which the dormant hair will fall out and be replaced with new hair.
It can go on for four to six years.
It's a normal thing you should not be worried about. But if you see you are rapidly losing hair, there may be some other factors involved as to why it happens.
Some more 'why's'
The stress induced by an illness can cause a large amount of man hair loss, but it is temporary and your hair will grow back.
When you have certain medicines you need to take because of an illness, it may happen too. Hormones working over hours have a major impact on your hair loss.
Pregnant women have it too. They experience hair loss because of their hormones going crazy on them. But after pregnancy is over, it all becomes stable again and their hair comes back. You should not panic about this as it's normal.
Treatment Options
Treatment for hairloss really depends what is making your hair fall out in the first place. Is it because of medicine and illness? Or maybe hormonal changes? Then the doctor will probably give you some other medicines or give you peace of mind by telling you it will not last.
If you are an older man or woman and are experiencing "common baldness", then there are medication options such as Rogaine, and Propecia to aid with your problem.
If you are experiencing thinning hair, no need to be too concerned about it. Usually it is a sign your body is experiencing an intermission of normalcy. You will eventually return to normal.