What causes my vagina to smell?

Infection: Sometimes, this may be normal (e.g. residual menstrual flow, moisture retention issues, etc...). However, if the symptom is persistent and associated with itching, soreness, redness and yellowish/greenish discharge; infection should be ruled out.

Vaginal odor: Especially with good vaginal hygiene is usually due infection particularly Bacterial vaginitis which presents fishy smell. Other infections due present with different odors