The first possibility is not to change the menstrual towel often. Nowadays, many people are very busy at work, and sometimes once they have finished their work, they have little time to get up and move. Maybe I only change my menstrual towel when I feel full. This will cause some bacteria to grow on your menstrual towel. Then there will be a terrible stench. Therefore, it is suggested that women must change their menstrual towels frequently two days before menstruation.
The second possibility is to wear tights. We all know that some women choose to wear those tights for beauty, because tights can show off her good figure. However, if you wear tights during menstruation, it will lead to the continuous fermentation of menstrual blood in a more closed environment, resulting in these unpleasant fishy smells.
There is a third possibility. We all know that some menstrual towels on the market are of poor quality, and some even have no signs of safety and hygiene. This will cause these menstrual towels to carry some germs during production. If we use such a menstrual towel, it may lead to gynecological inflammation, and the airtight menstrual towel will also lead to serious fishy smell.