Common Causes of Constant Fatigue
Low thyroid activity. If you’re experiencing constant fatigue it’s important to rule out hypothyroidism, a condition of low thyroid activity that causes fatigue and many other symptoms. More than 90 percent of hypothyroid cases in the United States are caused by an autoimmune disease called Hashimoto’s, in which the immune system attacks and destroys the thyroid gland. Hashimoto’s can be identified by positive TPO and TGB antibodies and should be addressed by managing the immune system, although thyroid hormone medication may still be necessary. Low thyroid activity can also be a result of other things, such as chronic stress or excess estrogen. Testing for TSH alone is not enough to assess a thyroid condition. For more information, read the book Why Do I Still Have Thyroid Symptoms? by Datis Kharrazian, and ask my office how we can help you manage low thyroid activity.
Blood sugar imbalance. Blood sugar imbalances are largely overlooked yet are a common cause of fatigue. Many people struggle with low blood sugar, high blood sugar (insulin resistance), or a combination of both. People with low blood sugar frequently skip meals, eat too little, or consume excess sweets and processed carbohydrates that cause blood sugar to spike and then plummet. When blood sugar is low people experience fatigue, lightheadedness, shakiness, feeling spaced-out and other symptoms.
Consuming excess sweets and processed carbohydrates and overeating may also lead to high blood sugar, or insulin resistance. People with insulin resistance often have difficulty falling asleep or sleeping well and frequently feel fatigue as a result. They also feel tired after meals, particularly meals high in carbohydrates.
When struggling with fatigue, you should always evaluate your diet and eat foods that keep blood sugar stable, and eat frequently enough to prevent blood sugar from dropping too low.
Anemia. There are many kinds of anemia, but iron-deficiency anemia is the most common. The body uses iron to make hemoglobin, a part of blood cells that carries oxygen. Low iron deprives the body of oxygen and hence energy, causing fatigue. A common cause of iron-deficiency anemia is poor nutrient absorption due to undiagnosed celiac disease or gluten sensitivity, so gluten intolerance should be ruled out in cases of anemia. Other common causes of anemia are B12 deficiency, inflammation, or an autoimmune disease. It’s important to know which form of anemia is causing your fatigue as supplementing with iron when you don’t need it may cause toxic levels of iron. Although the body needs iron to function, in excess it is damaging.
Adrenal fatigue. The adrenal glands sit atop each kidney and secrete adrenal hormones to help us respond to stress. Many people suffer from adrenal fatigue, a condition in which the adrenal glands produce insufficient stress hormones. Common symptoms are constant fatigue, low blood sugar, and low blood pressure. Poor adrenal function is always secondary to something else, such as chronic inflammation or poor diet. To support your adrenal health to combat fatigue, it’s important to find out what is stressing your body.
These are just a few causes of fatigue. Fatigue can be a sign of many different health disorders. Other things to consider are food intolerances, gut inflammation, hormonal imbalances, brain chemistry imbalances, dehydration, and of course lack of sleep.