In order to prevent or manage fishy vaginal smell, follow a healthy diet and restrict consumption of foods such as garlic, asparagus, broccoli and onions among others. Also practice good intimate hygiene such as washing the vaginal area with warm water and a milk soap, and using good quality panty liners to absorb excessive vaginal discharge.
There could be many reasons why you could be experiencing a fishy vaginal smell - from a possible bacterial infection to your hygiene routine. Visit your gynaecologist to understand the reason.
Follow intimate hygiene and incorporate some healthy lifestyle choices. Wash your vaginal area daily, don't use products that have strong fragrances, and wear loose clothes and cotton undergarments. If these changes don't help, you may need to consult a doctor as it could a bacterial infection, which would require medical guidance.