3. Digestive Issues: 

Bad mental health is most likely to affect your physical health, and it is almost always associated with your stomach. If you are eating healthy, and are still experiencing digestive issues like cramps, or lack of bowel movement, then it could be because of depression. Again, this can also lead to lack of appetite, because of which there can be constant fatigue. In case your doctor clears you against stomach problems, check with a psychologist to know if your low mental health is the reason behind your stomach issues.