Some women complain that they have difficulty equalizing their ears and sinuses when menstruating. Edema may also be responsible for this. The fluid that moves into the tissues from the blood vessels causes puffiness, much in the way that putting a sponge into water makes it swell. If this swelling affects the lining of the sinuses and Eustachian tube, it can make equalizing these spaces more difficult. This issue requires good judgment on the diver's part.
Many women report feeling increasingly anxious around the time of their period.
For a woman experiencing anxiety, making the decision to dive should depend on whether or not that anxiety impairs her ability to respond appropriately in an emergency situation. A smart diver recognizes her limitations, and avoids endangering herself or a buddy. Most women will find that they are able to dive without difficulty throughout their menstrual cycles. The main consideration for a menstruating woman is to avoid pushing herself. And if unsure, consult a doctor about whether or not you should dive.