CBD oil is generally well-tolerated and safe for most people. However, like any substance, it is possible to experience an allergic reaction to CBD products. Adverse effects of an allergic reaction might include itching, hives, and difficulty in breathing.
If you experience these symptoms after using CBD isolate, stop using it and seek medical attention. It's always best to consult with a doctor before using any new substance, especially if you have a history of allergies.