The ticket to soothing endometriosis pain could be a daily bowl of oatmeal. Endometriosis occurs when little bits of the uterine lining detach and grow outside of the uterus. Experts say these migrating cells can turn menstruation into a misery, causing so much inflammation that they trigger severe cramping during your period, plus a heavy ache that drags on all month long. Fortunately, scientists say opting for a diet rich in oats can help reduce endometrial pain for up to 60 percent of women within six months. That’s because oats don’t contain gluten, a trouble-making protein that triggers inflammation in many women, making endometriosis difficult to bear, explains Peter Green, M.D., professor of medicine at Colombia University.