It is good practice to be acquainted with all your body parts, and knowing what things generally look like down there improves your chances for quickly identifying anything abnormality — like bumps, lumps and everything in between. Get to know your vulva landscape, and they know what all the little things that might pop up on your vulva or vagina may mean. Possible reasons are:
Poor shaving routine
A big cause of bumps is ingrown hairs, something caused by the simple routine of shaving pubic hair. Do not squeeze, tweez, poke or prod them as that will only make it worse and possibly lead to an infected ingrown hair. learn to shave regularly using clean sharp blades.
You have a skin condition
Just as you can get dermatologic conditions like psoriasis and eczema everywhere else on your body, you can also get them on the vulva. Just like you can get derm conditions on your vulva, you can also get pimples. If a bump you suspect to be a pimple does not go away in a week or so, or gets bigger and more painful rather than smaller over time, it does not hurt to see your doctor.
You might have an STI
A few Sexually Transmitted Infections list bumps on the vulva or near the vagina as symptoms. Genital warts show up as skin-colored or whitish bumps around the vulva and vagina. Your body's own immune system may successfully fight the virus causing warts. If they are persistent, seek medical attention.
Something is up with your Bartholin's glands
This is mostly responsible for most bumps in or near the vagina for younger women. The Bartholin's glands are two little pea-sized glands that sit right inside the vaginal opening and secrete all the liquids that lubricate the vagina during sex. Occasionally, a cyst forms on one or both of the glands. If you feel a painful bump on the inside of your vagina, see your doctor.