The different zones of the intimate area form a single functional unit and have a balanced, natural system of protection and self-cleaning. Everything in both the vagina and the outer area (the vulva) is normally geared towards good defence against foreign micro-organisms (bacteria and fungi).
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If this protective system is disturbed, infection and irritation (such as a burning sensation and redness) can develop in both these inner and outer areas.
It is important in particular for women who are susceptible to vaginal infections and/or who have sensitive skin in the vulvar region to watch out for problems in this entire area, both inside and outside, because external problems can affect the vagina, and vice versa.