The left breast nodule, most commonly caused by breast hyperplasia, is a benign nodule, the patient will also palpate the swelling in the gland, the surface is smooth and well-defined, ultrasound examination can also suggest that the envelope is intact lesions, can be regular follow-up and observation. You should pay attention to the treatment of breast enlargement, you can take oral Chinese medicine to regulate, choose the flat elimination tablets. The actual fact is that you should not strain yourself or stay up late, and you should do physical exercise appropriately. If the nodules gradually increase in size within a short period of time, or if the symptoms of pain cannot be controlled by medication, surgical treatment can be chosen in this case, usually under epidural anesthesia, with preoperative ultrasound localization and exploration to remove the lesion completely. Patients with breast nodules should also be reviewed regularly after surgery, with ultrasound examinations every three to six months.