It does sound like an inflammed hair follicle or it may be a boil. I know it's embarrassing to show to the Dr but I think it would be a good idea for you to do so. It may be that you need a course of anti-biotics. Good luck.
Hi, It sounds like boils. There are glands on the outer area of labia major called Bartholins Glands its common for women to get boils there, they are very painful. Does it start out like a grain of sand and quickly in one or 2 days become the size of a egg?
You really need to see your gyno for advice, if it is infact boils you whould be on antibiotics, if its anything else, you need to be treated also, no reason to suffer, and you may be at risk for infection by them bursting and perhaps the reason for somany is the bursting...kinda like picking pimples, as a teen and then getting more and more.
for sure do not shave this area, not even bikini line, use gentle soap like a brand with no perfumes, and do see your doctor asap.
best wishes,
Cherie762