Breast cancer survivors experience constant fatigue and a recent research has shown that one in three women who have survived breast cancer are victims.
![Aging Accelerates Among Breast Cancer Survivors
Aging Accelerates Among Breast Cancer Survivors](https://www.medindia.net/afp/images/Health-disease-cancer-breast-serotonin-148429.jpg)
The autonomic nervous system is divided into two parts - the sympathetic and parasympathetic system, which control unconscious activities like digestion, heartbeat and breathing.
Source-Medindia