This is exactly what I have been experiencing! I have been using CPTG essential oils for over a year & all of a sudden a few moths ago I started having rashes with my lavender. I’m surprised because I’ve never had allergies or skin sensitivities before. Lavender is one of the most gentle oils & used for skin so I’m sad & frustrated about my reactions. Even diluted I get a rash. It’s also one of my favorites. I’m hoping I will be able to use it in the future. I’m glad I found this thread so at least I’m not alone!