Typically done once a week or once every two weeks, hot oil treatment for hair is a treatment where you place hot oil throughout your hair. There are many benefits of hot oil treatment that can be great for all different hair types. Some of the main hot oil treatment benefits are: moisturizes hair that is dry and brittle, helps with dry scalp and dandruff, can help increase the blood circulation in your scalp, strengthens hair, adds shine to hair, helps prevent split ends and frizz.