Is it okay to have massage if you have menstruation?

Yes. The massage therapist doesn't necessarily need to know about you being on your period, but if you are bold enough to bring it up and ask for an abdominal massage, it can actually decrease cramping as well as help with the flow.

Also, if you are late in starting, the use of hot stones during the massage (with one placed on the lower abdomen) can help get you started. (CAN, not necessarily WILL)