Why do i have very dry lips? i always put on lip balm and vaseline . and no i don't use make up

Lip balm can cause!: Many people become addicted or at least dependent on lip balm; lip balms often have chemicals that irritate lips. Ingredients in toothpastes and gums may also irritate your lips. Try stopping lip balm, explore a diff. toothpaste, drink more water and supplement with fish oil. See https://www.epiphanydermatology.com/blog/lip-balm-addiction/ and https://www.health.com/beauty/lip-balm-addiction