There are essential oils available to benefit hair scalp with dandruff. The most popular essential oils for dandruff are cedarwood essential oil and lemon essential oil. Cedarwood essential oil helps increase scalp circulation. While it is traditionally used for hair loss and dandruff, cedarwood essential oil is also anti-fungal. Just massage into scalp and leave overnight on your hair. Thoroughly shampoo the following day. Lemon essential oil Lemon essential oil greatly decreases dandruff as well as scalp flakes. It eliminates sebum and serves as a very effectual antibacterial treatment that is natural.