Whole body ITCHES before period!!!??

A few years ago I started taking DIM to treat my hormonal acne and ever since I have been experiencing intense itching over my whole body, especially my legs, vulva, and back. I can't say that DIM is the cause but I will say that I didn't have this problem before. I've stopped using it over a year ago but this problem persists and it's driving me insane.

Does anyone else experience intense itching all over before period? Know any causes? Any remedies?