There is still fluid accumulation in the right breast cancer surgery area nearly one year, which is considered to be related to traumatic exudation, fat liquefaction, lymphatic fluid leakage and other factors. 1. Traumatic exudation: usually due to the large traumatic surface of breast cancer surgery, the subcutaneous tissue will exude when healing and will gather in the traumatic area, thus the phenomenon of still having fluid accumulation in the breast cancer surgery area for nearly one year. 2. Fat liquefaction: it is usually due to the large damage of breast cancer surgery on human body, which will cause certain adverse effects on the blood supply of fat tissue and necrosis, thus causing the phenomenon that there is still fluid accumulation in the area of breast cancer surgery for nearly one year. 3. Lymphatic fluid leakage: it may be due to the fact that there are more lymphatic vessels around the breast, and when the breast cancer surgery is carried out, it will cause certain damage to the lymphatic vessels, which will lead to the phenomenon that there is still fluid accumulation in the area of breast cancer surgery nearly one year later. If there is still fluid accumulation one year after breast cancer surgery, you need to go to the hospital for consultation in time to avoid delaying the condition, and in your daily life, you should pay attention to rest and reasonable diet.