The strong odor in the vagina can be caused by an excessive increase in the amount of bacteria that are normally found in this area. This type of vaginal infection can appear due to a lack of hygiene, which is not always justified by a poor cleaning routine. . If not, that can also be influenced by a drop in PH levels. The latter can be stimulated by the use of commercial toilet soaps since these have low levels of acidity, thus promoting the lack of protection of the genital area.