You can help get rid of and treat an ingrown pubic hair by soaking a washcloth in warm water and then press the warm washcloth against the area where the ingrown hair is and leave the washcloth pressed against the ingrown pubic hair for 4 to 5 minutes to soften the hairs.
And then use some tweezers or a needle to gently work the end of the ingrown hair out one by one.
And then once the ingrown pubic hair is removed apply some cream to help prevent inflammation of the skin.