Chest pain two years after the right side of breast cancer is removed may be related to nerve damage, endocrine disorders, breast hyperplasia, breast cancer recurrence and other reasons. 1. Nerve damage: when the nerve is removed by surgery, it will lead to nerve damage, and if it is not repaired well, it will easily cause nerve pain, resulting in chest pain. 2. Endocrine disorders: If patients have bad habits such as staying up late for a long time and drinking alcohol, it will easily cause endocrine disorders, which will make estrogen higher in the body and easily cause chest pain. 3. Breast hyperplasia: breast hyperplasia can cause chest pain after breast cancer is removed from the right side. 4. Breast cancer recurrence: it is possible that the chest pain is caused by tumor or metastasis of cancer cells. It is recommended to go to the hospital for further examination of chest pain after two years of right mastectomy for further treatment after clarifying the cause of the disease.