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1 Normal vaginal itch: This occurs in most women around the time of their period. 2  This usually happens due to a drop in estrogen levels, which leads to the thinning and inflammation of the vaginal wall. 3  It is normal for this to be accompanied by a stinging sensation around the vaginal opening and lower third of vagina.here are two types of vaginal itch: 1  Normal vaginal itch: This occurs in most women around the time of their period. 2  This usually happens due to a drop in estrogen levels, which leads to the thinning and inflammation of the vaginal wall.
However, Briden says it's when pain is abnormal and can lead to sever pain and vomiting that women should go straight to a doctor. 'Normal period pain should be on the first or second day of bleeding, not later in the bleeding cycle or before. So timing is all part of the warning signs,' says Briden.