Thank-you very much for your question.
I’m going to be very honest with you. Many skins do not handle shaving in pubic areas very well at all. Ingrown hairs, sensitivity and pigmentation in those areas is a result of shaving, which is quite common.
If you really have your heart set on shaving, you can try a few things like:
1) NOT shaving with soap, but rather use a shaving gel or a very gentle cleanser.
2) Make sure you regularly moisturise the area with an aloe gel
Depilatory creams, unfortunately, are quite harsh on the skin, so some people experience quite a bit of sensitivity and discomfort (swelling, redness, flaking, drying), due to using these.
Some people wax, and again, this is something you would have to try, but if you are prone to ingrown hair, the chances are good that you may experience the same thing when you wax (although, you would be “hair free” for longer periods of time).
The best course of action, by far, in my opinion, is to rather consider doing laser hair removal. Rather take away the hair and not have the issue of shaving and and all the side effects any longer. If there are no hairs to result in ingrown hairs, you stop the whole problem.
There are definitely products you can use to help you deal with the spots and pigmented areas that you already have. A product like Lamelle’s Brighter concentrate serum can be applied to treat the pigmented spots that have resulted from the ingrown hairs.