Something I discovered recently while trying to find a common denominator in the lip balms I have used since forever. Limonene and linalool (lemon oil and lavender oil), which are found in most lip balms, especially natural ones, can cause irritation and contact dermatitis, cause cell death and damage fibroblasts which produce collagen in the lips and skin. Most of my lip balms contain them. Something to think about.
Personally, I don’t think my EC was CAUSED by these two oils, but rather the lip balms I use don’t help my cause and may be damaging instead of healing.