Is Fatigue a Symptom of Cancer

At one point or another, we have all experienced fatigue. For most of us, it is temporary, usually caused by stress or being overworked. For some people, however, fatigue can become persistent, occurring daily. When fatigue becomes frequent, it is natural to be concerned about what may be causing it. One of the first things many people think may be the culprit for their fatigue is cancer. Is fatigue a symptom of cancer? If so, how common is it?

Fatigue As a Symptom of Cancer

We often hear about cancer patients who are extremely fatigued, but cancer-related fatigue is often caused by the effects of cancer treatment, not always the cancer itself. In cases of leukemia and lymphoma, however, fatigue can be experienced fairly early at the onset of the disease. Symptoms of Leukemia and Symptoms of Lymphoma

In cases where fatigue is caused by the cancer itself, the causes vary. Cancer cells must aggressively compete with healthy cells for nourishment. This metabolic process can cause fatigue. Some cancer types can disrupt hormone functioning, thus leading to fatigue. It is also believed that some tumors may excrete substances that can cause fatigue as well.

It is important to remember that fatigue is not exclusive to cancer. If you are experiencing fatigue, it may be related another less serious condition.

What to Expect at The Doctor If You Are Experiencing Fatigue

When your chief complaint is fatigue, cancer isn't likely to be the first thing on your doctor's mind. Remember, fatigue is related to so many other conditions, your doctor will want to rule out the most common conditions first. This will be accomplished through a physical and routine blood work. Your doctor will likely order a few different blood tests, like a CBC, Chem 7 panel, TSH (a test to check thyroid function -- a common culprit of fatigue), and other tests depending on any other symptoms you may have.

During your visit, your doctor may ask several question relating to your quality of life and what factors may contribute to your fatigue. Possible questions include:
How many hours do you work? Are you stressed at work?

Have you had any major life changes, such as a marriage, birth, or death?

How often do you exercise?

Do you sleep well? How much sleep do you get?

How is your diet?