Herpes vs Ingrown Hair Differences and Treatment K HealthNodule from an ingrown strand is an unpleasant ailment which demands proper treatment. This kind of bump forms when an ingrown hair becomes in within the skin, causing swelling and potential infection. Treating an ingrown hair cyst caused by an ingrown strand effectively may help ease pain and avoid additional complications. In case you are having difficulties with an ingrown hair cyst, consulting professional advice is advisable to address it adequately and avoid any potential risks associated with treating it on your own.