Should You Switch to a Menstrual Cup?

4. Menstrual Cups Don't Smell

You might notice an unpleasant odor with used tampons or pads; air from the outside can start to cause bacterial reactions when it mixes with the menstrual flow. Because, through suction upon insertion, a menstrual cup seals against the outside environment, the blood remains fresh and won't start to smell. As with any bodily fluids, though, if you notice a change in scent, you should speak to a medical professional.