Please choose the correct ending to complete the given sentence: Health: [header] How to use essential oils to prevent an itchy scalp [title] Talk with your dermatologist. [step] Before you start any home remedy for scalp issues, you need to talk to your dermatologist. They will help you determine the cause of your itchy scalp.

Ending1: Look on your dermatologist's website for more information. Some common causes include : [substeps] Hair allergy skin irritability scalp insecurity [title] Use tea tree oil as a hair remedy. Ending2: Discuss with him or her how you want to use home remedies to help, especially essential oils. He or she will help you find the right blend for you. Ending3: For example, they may suggest switching to essential oils without causing a allergic reaction. [substeps] Your dermatologist may suggest a carrier oil such as lavender or orange essential oil. Ending4: This is the best way to determine if you need to make any lifestyle changes, and how often you can use your essential oils. [substeps] Ask your doctor about the benefits of your essential oils if you're pregnant.

Answer format: ending1/ending2/ending3/ending4