Overexposure to the sun, swimming,blow drying ,straightening and products with alcohol which can all dehydrate hair and makes them dry,fizzy,dull and unhealthy. Here is some simplest and easily accessible remedies to treat dry and damaged hair .
Oil Massage

Massage your scalp with warm olive or
Coconut oil before going to bed, leave it on overnight and wash your hair next morning. 

3. Banana

Bananas are rich in potassium which is good for hair health. Mash one ripe banana and apply it  on your hair from the roots to the ends. Leave it on for up to an hour and then rinse it of with lukewarm water. It gives moisture to your hair and makes them softer.

3. Milk

Massage your scalp with milk and apply along the length of  your hair before shampoo.leave it for 30-40 minutes and then wash it off. It makes your hair naturally silky and soft.

4. Honey

Honey is a best conditioner for dry hair.Mix 2 tbsps of honey in 4 cups of warm water and apply it to your hair after you shampoo.It will control hair dryness.

5. Yogurt

Yogurt good source of protein, it nourishes your hair and makes them shiny and soft .Apply yougurt on your hair from roots to tip and leave it for 30 mnutes.Wash it off after 30 minutes.

6. Eggs

Eggs are rich in protein and several other nutrients which are necessary for hair and scalp. Wisk 1-2 eggs and apply on your hair and scalp, leave it for 30-40 minutes and then rinse it of with mild shampoo.This mask will mousturize your hair and repair the damage.