One of the most common benign causes of lumps on the vaginal area is cysts. These are blocked glands that often swell up and can become painful. Sometimes, they can look like pimples, and you may be tempted to squeeze them to relieve the pain and pressure. This is generally not a good idea because you open up the area to infection from the rest of the vulva. It is better to allow these cysts to open on their own and drain naturally. For large and very painful cysts, it may be necessary to see a doctor for drainage and an antibiotic. Two types of cysts are common in the female genital region. Skene's duct cysts often occur near the urethra, or the area where urine comes out. This area is usually between the clitoris and the vaginal opening. The other type of cyst is Bartholin cysts. These usually occur low on the labia majora and can cause a great deal of pain. Blocked hair follicles are common in the genital region and can occur on the inside of the vulva. This is often called an ingrown hair, and they will need draining if they are big and painful. Otherwise, they tend to resolve on their own. Similarly, you can have a clogged sweat gland in the genital region.
It sounds like HPV as that is where it typically grows. Depending on the type of bump it could be something else but only your gyno or doctor will be able to ascertain this. Please let us know.