For the treatment of hard bumps on the back is painful, mainly consider the following aspects: 1, boils, mainly a single hair follicle due to bacterial infection caused by inflammatory skin diseases, in the early stage can be applied anti-inflammatory ointment, such as mupirocin ointment for external use. In the late stage if there is a rupture, you can go to the dermatology department for laser treatment, or surgical incision and drainage and other treatments. 2, consider sebaceous cysts, mainly due to the sebaceous glands are blocked, sebum accumulation caused by infection, in the treatment of surgical excision can be carried out. 3, consider keloid, mainly because of the trauma or after the operation, caused by the subcutaneous connective tissue hyperplasia, which led to the emergence of keloid scarring, in the treatment of the topical use of Compound heparin sodium allantoin gel, but also to the dermatology office for pulse laser treatment, combined fractional laser treatment. Therefore, for the back long hard bumps are painful, you need to go to the regular hospital, under the guidance of the dermatologist for appropriate treatment.