A quick way to get a rough idea is that herpes appear more like blisters often filled with fluids, whereas genital acne appears like small pimples. Also herpes generally tend to cover more area, for example, they tend spread onto the thighs, while acne on the genitals tends to remain stationary. However you should consult a medical professional to be sure and put your mind at rest.
Some of the most common causes associated with genital acne are, wearing tight fitted clothes, some laundry detergents and soaps, ingrown hair, sex. and race.
Hygiene
Pimples can
be caused by skin-cell build-up, dirt and excess oil that have clogged
the pore. The vaginal area is no exception. Typically an antibacterial
soap is used to cleanse areas impacted by pimples, but this type of soap
can be too harsh for the vaginal area. A mild soap or feminine
cleansing product, such as a soap-free and fragrance-free product, can
be used instead. Washing the area with warm water can also keep the area
from getting infected and allow the pimple to heal.
Warm Compress
Never
pick at a pimple, especially in the vaginal area. Picking can lead to
scarring, infection and it can help spread the pus from the pimple to
the surrounding areas and cause new pimples. A soft cloth, wet with warm
to hot water, can be placed over the area to soften the skin. This can
reduce pain and may encourage the pimple to pop on its own. The National
Institutes of Health suggests that this is a good remedy for pimples that are caused by folliculitis, or an inflammation of the hair follicle.
Epsom Salts
A
sitz bath made with Epsom salts can sooth, cleanse and even help dry a
pimple in the vaginal area. To prepare this type of bath, run
about two to three inches of warm water in a tub and sprinkle one-half
to one cup of Epsom salts into the water. Soak in the tub for 15 to 20
minutes. Rinse the area thoroughly after the bath and pat it dry.
http://www.a1-allergies.com/acne-around-genital-area.html
http://www.livestrong.com/article/137451-remedies-vaginal-pimples/