It is needed to know reason for hair falling first.
Lack of sleep, Tension and stress, impure water, deficiency in nutrients, some chemicals in water and medicines.
Try to get proper sleep by following healthy habit. Avoid tension by spending some time in good entertainment, prayers and simple exercises.
Eat balanced food. Avoid foods that are very spicy. Take fruits after meals .
For some time try by reducing the frequency of shampoo and conditioner. Use shikakai powder or hibiscus powder for hair wash. Dandruff becomes more if you use thick oils and you get exposed to dust much. You may use coconut oil.
Dry hair well by towel after taking head bath. In summer and warm climate, you may use coconut hair oil containing camphor.
In ayurvedic medical stores you can get Neelibhringadi, Kesavardhini,Bhringaraj or some other popular named hair oils. Ask for coconut base ones. You may also meet an Ayurvedic doctor in this regard.
Sometimes heredity also plays some part in hair fall. But premature balding and premature greying can be prevented and controlled by ayurvedic medicines and external applications. prescribed by a qualified Ayurvedic doctor.