Prevention is related to the cause of the fatigue. For example, avoiding stress and overexertion, getting enough sleep, and eating a healthy diet can prevent many cases of fatigue.
Fatigue can seriously limit a person's ability to work, go to school, and maintain relationships. Severely affected people may need to rest for most of the day. People with chronic fatigue often become frustrated because of the lack of effective treatment for this condition. Other long-term effects depend on the underlying condition.
Fatigue itself is not contagious and poses no risk to others. However, fatigue may sometimes be caused by infections that are contagious.