It is most commonly used to make marmalade. The juice is used as a flavoring for fish, and in Spain it is used on meat. In Mexico sour oranges are cut in half, salted, coated with hot chili paste and eaten. Bitter orange oil, expressed from the peel, is used for flavoring. Perfume is made from neroli oil is distilled from the flowers.
Bitter oranges have lots of health benefits whether ingested orally, applied to skin or inhaled. When eaten, they are natural remedies that help heal stomach aches and nasal congestion. If applied to skin, orange peels are known to help eyelid inflammation, headaches, muscle and joint pain. Bitter orange is also inhaled to reduce pain.