Small lumps on the breasts are considered to be caused by breast hyperplasia, breast fibroadenoma, breast cancer and other factors, and it is recommended to go to the hospital in time for examination and treatment under the guidance of the doctor. 1. Breast hyperplasia: If it is benign breast hyperplasia, it may be caused by the unstable hormone level in the body due to staying up late and irregular life, which will lead to the appearance of small lumps on the breasts and other phenomena. 2. Breast fibroadenoma: it is most common in young women, with better mobility and slow growth, and is mostly round or round-like. 3. Breast cancer: breast lumps are hard, inactive to touch, and adherent to the surrounding tissues. It is recommended to go to the hospital for examination in time to avoid aggravating the condition. Small lumps on the breast should also be considered Montgomery’s nodule, inflammation and other reasons, it is recommended that patients pay attention to rest, diet should be light and nutritious, avoid smoking and alcohol. Need to go to the hospital in time for a detailed examination and further treatment.