 [ Symptoms ] dietary changes  for about three weeks now i have been eating healthier foods and exercising regularly i have been feeling great except i recently have been having changes in my stool i keep feeling like i need to use the restroom but when i try all that comes out is some sort of yellow mucus is this just my bodies reaction to my change in diet and exercise i have made an appointment to see my health care physician but it is not until next week and i am really concerned [ Disease ] typically bowel changes from introducing a healthy diet result in gas and some bloating as fiber is increased this typically goes away after the body adjusts to more fiber i am not aware of yellow mucous being a side effect of diet changes mucous or blood in the stools should always be checked out by a healthcare provider so you are doing the right thing by making an appointment good luck for more on normal bowel movements see this webmd article