Constipation and early satiety or loss of appetite could be indeed symptoms of colon cancer.
This mainly happens when the colon cancer is located at the last parts of colon, more near the rectum or rectum itself.
In the beginning of the colon, waste material is slushy and can easily maneuver around anything that gets in its way. But as it nears the end of the colon, stool solidifies and it is very difficult for waste to get by, resulting in severe constipation.
The cancer obstructing the colon sends signals like there is a food in body and this results in a sense of fullness or no need for food intake.
The loss of appetite and weight loss are also related to release of certain chemicals from the cancer itself, that are increasing one's metabolism.
It is best to consult her physician about treating the constipation.
If the cancer causes almost complete obstruction of the bowel, she shouldn't take anything like oral laxatives.
Giving an enema through the rectum to trigger a bowl movement is often a treatment of choice.



Best wishes!
Marija