Essential Oils to Treat Lumps on Scalp Naturally: Lavender oil, tea tree oil etc are some of the essential oils used to get rid of the lumps like the acne or pimples on the scalp. Because of the fact that tea tree oil comprises of certain antibacterial properties, it is beneficial in fighting with the causes that grows lumps, bumps like the acne on the scalp. Massaging the scalp with tea tree oil along with olive oil and rinsing the head after an hour is effective. Lavender oil can be mixed with the tea tree oil and the olive oil for better results in treating the lumps on scalp, especially those scalp pimples which can be itchy and irritating. lace-up corset dresses for a wedding