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Vaginal burning could be due to various reasons as yeast infection,vaginitis,trichomonas infection,vaginal irritation because of any condom or lubricant use.
Avoid wearing tight undergarments.Wear loose cotton clothes.
Do not use douches and tampoons.
Wash the area twice with antibacterial soap and water andkeep it dry.
Kindly visit a Gynaecologist for correct diagnosis.
Take Care!