Having the words for your own body makes every medical conversation easier — and makes it far more likely you get the right answer.
The pelvis is crowded. Your bladder, bowel, reproductive organs, muscles, nerves, and the base of your spine all share a small space. Pain in one can feel exactly like pain in another — which is why "where does it hurt?" is a harder question than it sounds, and why naming things precisely helps so much.
These two words get used interchangeably, and the confusion causes real problems — a symptom on the vulva treated as a vaginal one, or vice versa. Everything you can see is the vulva.
A hammock of muscle slung across the base of your pelvis. It holds your organs up, and it opens and closes to let urine and stool out. Like any muscle it can be too weak, too tight, or simply badly coordinated — and each of those causes different symptoms. Leaking, constipation, pain with sex, and a feeling of pressure can all trace back here.
This is why pelvic floor physical therapy exists, and why it is often the treatment rather than an add-on to it.
Treatments for vulvar conditions only work where you put them — a cream applied inside the vagina does nothing for skin on the outside that hurts. If you are ever unsure where a medication goes, ask for a mirror and a diagram. It is a completely normal request, and it changes how well treatment works.
General education, not medical advice for your specific situation.