Thyroid condition, poor diet, stress, depression, washing your hair too much, not brushing your hair enough, can be genetics, hormonal related.
There many reasons for hair loss.Everything is related with this ,Thyroid condition, poor diet, stress, depression, washing your hair too much, not brushing your hair enough, can be genetics, hormonal related etc.
The main reason behind hairfall is stress. I agree with all above answers but if these are not true in your case then you are definitely in stress or your water intake may be low.
Whenever my water intake become lower I am more prone to hairfall. At that time I increase it to 4-5 liters a day. Within one month difference is visible.
Anyone who is dealing with hair fall should start his/her day with 'Amla' juice. It's proven to reduce hairfall.