If you are prone to irritation: fragrance free, every time. It is the single change that resolves the most complaints in this category, and it costs nothing to try.
If you are thinking about douching: do not. The vagina is self cleaning, and flushing it out strips the bacteria that keep it balanced. External washing is the entire job. Anal douching is a different product for a different purpose and none of this applies to it.
If you shave the bikini line: cream, with the grain, and something soothing after. A sharp blade and a proper cream prevent more bumps than any product applied afterward can fix.
If something has actually changed: a new or strong odor, itching, or unusual discharge is a doctor question. Nothing here treats an infection, and covering one up only delays the thing that would.
If this is about your period or about recovery after birth: the timing changes what actually helps. Period Management covers the flow and cramp side of the week, and Postpartum covers the weeks when everything is still tender.
On what to look for: fragrance free where you can, pH conscious, and external use unless the label clearly says otherwise. Less is usually more here. Sexual Health and Wellness is the wider hub if you came looking for pelvic floor tools or toy care.