On average there are 100,000 hairs on the human head. Each hair grows for about three years before it falls out and a new one grows. Around 50 to 100 hairs fall out every day, no matter the length of the hair, so it is not necessarily a worrying sign to see hairs falling out. If you realise the hair loos is much more then usual , I recommend you to see your GP first for some blood test as this can have other causes as stress, hormone imbalance, Iron deficiency etc.
Also styling products and heating equipment , if used in excess, can make your hair weak and easy breakable so you’ll say your hair is falling when actually is braking I recommend you to trim your hair every 6-8 weeks and use hydrating hair masks 1/week . If you have damage hair ends then I recommend you to give them a trim asap and see if you realise an improvement in your hair loss. When your hair is long you realise more the normal daily hair loss then when is short.