I swear by Dream Cream by Lush. It's crammed with loads of naturally healing products, smells gorgeous and soaks in really well. I use it on rashes and eczema. It is a bit pricey, but worth every penny!

If i can give you a tip. Use a sharp/new blade. And when you shave, don't shave against the hair growth, shave with it. This will prevent a rash.

I have found that if you scrub the area carefully before and after with soap and pretty hot water, you can sometimes prevent or minimize the little bumps. On the outside of the bikini area, in the less sensitive areas, peroxide provides the same service, preventing bacterial infection that can cause irritation. :)

Unfortunately, I think this is natural. Ive shaved my bikini area for several years, and still to this day, after using every shaving rash cream and spot lotion. I still get the little spots, usually just before the stubble comes through. It only just lasts a couple of days the most, so dont worry about it. Though I know its embarassing specially if you're with your bf or going swimming in a bikini, and you have an awful area. But as far as I know, all my friends get this shaving rash and spots even when they wax, shave, pluck or even hair removal cream!

I switched to Dove deodorant which is moisturising as well as anti-perspirant and this solved my grey pit problem