Vaginal odor can be due to a sexually transmitted disease like trichomonas or trich, yeast infection, or bacterial vaginosis. Try these home remedies for vaginal odor -

• Douche your vagina with a mixture of vinegar and water in equal proportions. This will help to eliminate the unpleasant vaginal odor.  
  
• Add 2-3 drops of tea tree oil in a cup of water. Apply this water to the vaginal area to reduce the odor.
  
• If yeast infection or bacterial infection is the cause for your vaginal odor then add some yoghurt in your diet for acidophilus. You can even take acidophilus supplements.
  
• Always remind your partner to wear a condom while having sex and avoid any sexually transmitted diseases.
  
• Keep your vagina dry and clean. Avoid wearing synthetic clothing; instead wear clean dry comfortable cotton panties.
  
• Avoid scratching. Try wearing boxer shorts while sleeping at night for better air circulation.
  If the odor lingers for long time and is accompanied by itching or scratching then consult a specialist to diagnose the exact cause for the problem.