I will share a tip that I recently got
Neosporin! Once you have the little bumps on the bikini area, not the under area, after your daily shower/bath, rub some Neosporin really good into your skin. Again, don't let it get down to any openings, just on the front of your pelvis. After one day of trying this, my bumps/scabs were about 75 percent better. After doing this two or three days (once a day), the bumps were gone.
As far as keeping them from coming back when you shave again, I don't know what to say. They keep coming back for me no matter what I try. If I only shave the itty-bitty area where my thighs meet the front of my pelvis or anywhere "underneath," I'm fine, but as soon as I shave anything more in the "big bush" on the front, I break out horribly. For me, I might just stop shaving the front pelvic area. It hurts with all the bumps/scabs, and DH doesn't really like the front shaved.
If you have an aloe plant or access to one or 100 percent pure aloe (can be gotten in the refrigerated section of a health food store in a brown bottle), I've read that can help the bumps if you rub some on right after you shave. Once the bumps appear, tho, Neosporin helped me tremendously.
P.S. For the mole/ingrown hair, if it's like a sore, big pimple/cysty type thing, you can try putting a hot compress on it when you shower. You'll need to do this daily until it comes to a head and breaks on its own. It may work; it may not. I had a small cyst appear last summer that I waited about three months before getting checked out just to be safe. The compresses did not help that one, but they've helped others clear up I've gotten over the years.