1.Oily hair should be washed every alternate days.
2.Rinse the scalp with lemon and use shampoo which are herbal and rich in henna.
3.Give head massage to your hair regularly .To know about hot oil hair treatment click here.
4.Avoid oily food.
5.Drink lots of water .
6.Try to avoid oily and junk food.
Regular use of these tips maintains the PH level of the scalp which helps in maintaining oily hair easily.