Can I use summer eve douche' while on my menstural?

Just an opinion..... I hope you can find a way to avoid it at any time. It is not necessary if you wash well and perhaps use a pleasant smelling body oil and it can be damaging to your body's natural chemistry. Read about the pros and cons and consider it for yourself. If you decide to continue use, i don't think it would be more of a problem during your period.