Ingrown hairs are a common problem in which the hair curves and grows back into the skin. Regardless of the location, the same treatments are used to address ingrown hairs.
A more permanent way to address ingrown hairs is laser hair removal. For hairs that have pigment (color), the laser is most effective. "Peach hair" is least effective with laser treatment. You should consult a physician in your community to address the above and ask questions as the success of hair removal in relation to the color of the hair present.