I know exactly what u are talking about, as do I treat me pubic region the same and shave/trim using the same product.
Mine usually go away withing a 2wk-2 month period. Something that I notice is overtime they become soft so I pop them and a clear fluid comes out just like popping a pimple then in eventually dries and goes away. Also try not to use lotion to moisturize the area after shaving but maybe a vaseline/petroleum substance.
Its nothing to worry about physically its just a bump that u dont like were it is. And another treatment I HAVE NOT TRIED but havent though about, is using a bump removal product that u would use on ur face. I use a product from Wal-mart in a blue box called Bump Patrol which is like a gel that doesnt need alot to apply and is very effective on the face. Just a thought.
Hope my info was useful, contact me at anytime if u need to.