How to Tell if You Have a Fever

Photo of a thermometer
Tuesday, March 15, 2016

Patients often express their confusion over what constitutes a fever and, more importantly, when to seek out care for one. As the first-line of care for a suspected fever is often the emergency department, it is important that cancer patients who are receiving chemotherapy do not unnecessarily expose themselves to other sick people in this environment unless necessary.

How do I know if I have a fever?

Keep a thermometer at home and take your temperature while you are getting chemotherapy treatments if you are feeling hot or unwell (for example chills). You have a fever if your temperature taken in your mouth is above 38.3°C at any time, or above 38.0°C for at least one hour. Phone your health care team or go to the closest emergency room right away if you have a fever. Patients in the South West region who are undergoing cancer treatment are asked to carry a Fever Card with them at all times. It’s extremely important that patients present this card to the Emergency Room triage nurse when they arrive with a fever. This card signals to medical staff that you are currently undergoing chemotherapy and ensures that they are taking the proper measures to provide you with safe and timely care.

Cancer Care Ontario has also created a short, simple postcard based on a new fever assessment guideline to help patients better understand if they have a fever. To view the fever postcard, and find more links to helpful information about managing cancer symptoms, go to www.cancercare.on.ca/symptoms