9-year-old child with lump on left breast

9-year-old children left breast has a hard mass, may be breast physiological development, breast hyperplasia, local infection and other reasons, need to be targeted treatment according to the specific etiology.1, breast physiological development 9-year-old is in the early stages of puberty development, breast development is one of the signs of puberty. At this stage, the child may develop breast lumps, which are normal physiological phenomena of breast hyperplasia, usually without pain or redness. Parents should closely observe the child's breast development to ensure that the lumps are natural growth and not pathological changes. At the same time, ensure adequate rest and good sleep quality of the child, conducive to normal development of the body. 2, hyperplasia of mammary glands may be related to local factors such as frequent external stimulation, endocrine disorders, etc., leading to abnormal hyperplasia of mammary glands and formation of hard lumps. Hot towels are needed to compress the affected area to promote blood circulation and help relieve pain and discomfort caused by hyperplasia of mammary glands. 3, local infection breast soft tissue by microbial infection, may cause inflammation or abscess, leading to breast lumps and accompanied by pain, redness and other symptoms. Under the guidance of a doctor, the use of cefixime, cefaclor and other antibiotics for anti-infection treatment to eliminate inflammation and infection sources.