Ingrown hair Diagnosis and treatment Mayo ClinicNodule resulting from an ingrown trichome is a painful ailment which requires proper treatment. Such form of lump develops when a hair becomes back within your epidermis, resulting in swelling and potential infection. Dealing with an ingrown hair cyst resulting from an ingrown hair properly may help ease pain and prevent further issues. In case you are dealing with a cyst, seeking professional advice is advisable to manage it adequately and avoid any potential risks associated with treating it on your own.