Grapefruit peels are a powerful antiinflammatory. Grapefruit peels can be used to help reduce itching from skin conditions such a psoriasis. In addition, rubbing grapefruit peels over mosquito bites or inflamed skin can provide relief. The antiseptic properties of grapefruit peel can be used on cuts or scrapes. Using grapefruit peels will help protect against infection and tetanus.