Dry hair can result from external factors, such as exposure to harsh chemicals, or from internal causes, such as an illness.use of harsh sampoo, exposure to sun, water quality etc.
1-Before shampooing your hair apply oil thoroughly to your hair and keep it for 1 hour and then wash.
2-use a mild shampoo
3 dry hair naturally
4-Always use a good conditioner after applying shampoo and washing your hair.
5- take lot of fruits.green veg
6-have sufficient water
7-protect you hair from sun
8-do regular yoga
and brething exercise
9-increse you protein intake, have balanced nutritious food.
hope its helpful. take care