There are many causes of nodules in the right breast, which can be caused by cystic hyperplasia, breast fibroids, intraductal papilloma, and breast cancer. If symptoms such as high fever, pain, and fluctuating sensation to touch occur, you should seek medical attention immediately to clarify the cause and give targeted treatment. After treatment, follow up on schedule, maintain a good mood, and eat more vitamin-rich foods such as fresh vegetables and fruits. Common causes are as follows: 1. Cystic hyperplasia of the breast: cystic nodules, along with the menstrual cycle breast lumps, pain, most appear before the onset of menstruation, due to disorders in the body’s hormone levels, excessive hyperplasia of the right breast tissue to form a lump, touch will have obvious pain, after the onset of menstruation lumps and pain symptoms will be significantly better. If the pain is obvious, physical therapy such as local hot compress and infrared baking electricity can be taken, if the symptoms are not obvious, regular follow-up can be done; 2. In most cases, the lump cannot be touched by clinical examination because of the small size of the tumor, and when the lump is lightly pressed, it can lead to fluid overflow. In this case, you should go to a regular hospital for breast ultrasound or fine needle aspiration biopsy to clarify the nature of the nodule and actively cooperate with the specialist for treatment. If the nodule is glassy, it is considered as early stage breast cancer and should be removed locally. If it is a benign nodule, it can be observed first.