Seven and a half year old children with breast nucleus may belong to the abnormal performance, generally before the age of 8 years old the development of secondary sexual characteristics is called precocious puberty, it is recommended to go to the hospital in time to clarify the diagnosis, and then according to the doctor’s advice to carry out the appropriate intervention, precocious puberty will affect the growth and development. The 7.5 year old child with breast nucleus may belong to the abnormal performance, should be alert to the possibility of precocious puberty. Precocious puberty is usually caused by exposure to environmental estrogens, a more sensitive condition, or consumption of more hormone-containing foods. If environmental estrogen intake and exposure are controlled and reduced, it is possible that the nucleus of the breast will retract automatically. Normally, you should pay more attention, to develop a reasonable diet for your child, maintain an optimistic mindset, actively accept treatment, and maintain sufficient sleep and a good state of mind. Diet should pay more attention to, try not to eat spicy stimulating food, diet should be light and nutritious, to develop a good dietary habits. It is worth noting that it is necessary to consult a doctor to clarify whether there are other reasons for the appearance of breast lumps. After a clear diagnosis, targeted treatment under the guidance of the doctor.