Rosemary oil: daily health gyan

I myself am very uncomfortable with rosemary oil..maybe because I need it:) It hikes blood pressure.. my blood pressure veers towards the low, due to my childhood illnesses and deprivations, I guess:( Rosemary is also said to support memory. It is used for skin problems. But has lots of contraindications and is best used only after consulting a real aroma expert. I remember writing a health tip saying that a drop or two on the hairbrush on wet hair can control dryness and frizziness.