A six-year-old girl with a hard lump on the right side of the chest needs targeted treatment, mainly related to hematoma, precocious puberty, subcutaneous lipoma and other reasons, different reasons for different treatments, the need for further examination to clarify the cause of the treatment. 1. hematoma: the right side of the girl’s chest by violent impact, extrusion, caused by blood vessel rupture, the formation of hematoma hard lumps, can be relieved by local ice packs. 2. Precocious puberty: the excessive secretion of sex hormones caused by various factors such as food and drugs leads to the premature development of secondary sexual characteristics of girls, such as breast enlargement and the growth of pubic and axillary hair, etc. Pseudo-precocious puberty does not require medication, while true precocious puberty requires standardized treatment according to the cause of the disease. 3. Subcutaneous lipoma: it is a benign tumor composed of mature adipose tissue, with hard lumps with clear boundaries in several parts, mild pain when pressed and no other symptoms, usually no treatment is needed, but when it affects the aesthetics, malignant changes, or compresses the nerves, it needs surgical operation and removal of the diseased tissues. The above medication needs to follow the doctor’s prescription. In daily life, you need to adjust your diet and avoid the intake of hormone foods, such as royal jelly, etc. If the lumps continue to increase in size, you need to go to the hospital for examination and treatment. If the lump continues to grow, you need to go to the hospital for examination and treatment.