Question: what are the side effects of under eating?
Answer: Fatigue. Share on Pinterest Undereating can lead to a person becoming fatigued. ... 
Getting ill more often. Undereating can also lead to an imbalanced diet. ... 
Hair loss. ... 
Reproductive difficulties. ... 
Constantly feeling cold. ... 
Impaired growth in young people. ... 
Skin problems. ... 
Depression.