Watermelon can be eaten for breast cancer and there are no special contraindications. It is decided according to the patient’s own diet, while other fresh fruits and seasonal fruits can be eaten, but it is not recommended to eat too cold food, like watermelon which is recommended to be chilled, then it is not good for the digestive tract. Breast cancer is a very common malignant tumor in women, but it is not exclusive to women, many men may also have breast cancer, but the incidence is much smaller. Breast cancer may be related to estrogen, so it is not recommended to eat foods with high estrogen content, such as animal offal and ovarian tissue. However, other vegetables and fruits can be eaten. Breast cancer is a systemic disease that requires comprehensive treatment.