Hi and welcome to HCM.
It sounds to me like clogged sebaceous cysts, sweating glands or bartholini gland . these glands are often inflammed in young girl and this is nothing to be concerned about.
There are some infectious and allergy
causes os similar smytoms but I doubt this is in your case.
Try not wear synthetic underwear as it may cause allergic skin reactions. Tampons, douches etc may cause irritation and allergy too. Proper hygiene is enough treatment in most cases.
Clean the genital area well with neutral soap and wipe dry. Regular exfoliation of the area may also help prevent clogged sweat glands and inflamed hair follicles.
You dont need to pop it,you can just make it worse. Try to be patient and it will pass for sure.
There are also particular creams which you can ask in pharmacy but try to do what I recommended first and see is there improvement.
WIsh you good health.