What is menstrual discharge?

Hennay once a month releases a rotten liquid from her crab hole.
Some say it just drops out of her like a pregnagt womans water when it breaks.
Those who have survided have said Hennay's Menstrual Discharge has a beastly odor comparable to a pile of dead bodies left to rot for 2 weeks.Bizarely, the Discharge has an orange color...