What is the reason why pad can cause vaginitis?

When female compatriots owned sanitary napkins to make their menstrual period no longer embarrassing, people invented a pad with the principle similar to that of sanitary napkins. It can absorb the daily secretion of women outside the menstrual period, greatly alleviating women's worries. The pad is generally small and thin, so that people do not feel uncomfortable. Therefore, it is favored by many women. The use of sanitary pads is one of the causes of vaginitis, because long-term use of the pads will cause damp and hot private areas, which is easy to breed bacteria.