Simplify the following text for a Grade 9 native English-speaking person.
Original: Lip balm or lip salve is a waxy substance applied topically to the lips of the mouth to relieve chapped or dry lips , angular cheilitis , stomatitis , or cold sores .
Simplified: Lip balm is often used during the winter , because the cold winter winds can dry out a person 's lips so that they are cracked and hurting ( this is called having `` chapped '' lips ) .