Lump caused by an ingrown follicle is a painful issue that requires adequate treatment. This kind of cyst forms when an ingrown hair grows back within your epidermis, resulting in irritation and possible infection. Dealing with a cyst caused by an ingrown strand properly can help ease discomfort and avoid more problems. If you're having difficulties with an ingrown hair cyst, consulting professional guidance is advisable to address it properly and avoid any potential hazards associated with self-treatment.