Changes in the state of consciousness.

Lesions on irradiated skin that are shiny, red, blue, or black and that are hot, painful, swollen, oozing pus, or blood.

Dry mouth that does not allow you to eat and/or speak.

Sores in the mouth that do not allow you to eat, present intense pain and/or bleeding in a moderate amount.

Nausea and vomiting that prevent you from ingesting solid or liquid food.

Having more than 6 loose stools in less than 24 hours.

Temperature of 38° or more, difficulty breathing, burning or pain to eliminate, abundant bleeding from any route, intense pain that does not improve with the analgesia that your doctor has indicated.