Nodule caused by a strand can be an unpleasant condition that requires proper treatment. This type of cyst forms when a hair grows back into the skin, triggering inflammation and potential infection. Treating a cyst caused by an ingrown hair effectively may help alleviate unease and avoid more complications. Should you be having difficulties with an ingrown hair cyst, seeking medical recommendations is suggested to treat it adequately and avoid any potential dangers hinged on treating it on your own.