Why You’re Always Tired: 7 Common Causes of Fatigue

Person experiencing fatigue and low energy at home in St. Louis

Feeling tired all the time is frustrating. For many people in St. Louis, fatigue has become part of daily life.

You push through work. You manage family responsibilities. Yet the exhaustion never goes away.

Persistent fatigue is not normal. It often signals an underlying medical issue.

Understanding the causes of fatigue and when to see a doctor can help you regain your energy and improve your health.

What Is Fatigue?

Fatigue goes beyond feeling sleepy. It is a constant lack of energy that does not improve with rest.

Many patients describe it as:

  • Mental fog
  • Low motivation
  • Physical weakness
  • Difficulty concentrating

7 Common Causes of Fatigue

1. Anemia (low blood count)

Low blood counts reduce oxygen delivery in your body. This can cause

  • Weakness
  • Shortness of breath
  • Pale skin

Women and frequent blood donors are at higher risk.

2. Hormone Disorders

An underactive thyroid, low testosterone, or low estrogen levels can drain your energy.

Symptoms include:

  • Weight gain
  • Cold intolerance
  • Fatigue
  • Poor sleep
  • Low libido

3. Poor Sleep Quality

You may be sleeping enough hours, but not getting restful sleep.

Causes include:

  • Sleep apnea
  • Stress, anxiety, or depression
  • Screen time before bed

4. Vitamin Deficiencies

Low levels of:

  • Vitamin B12
  • Vitamin D

can lead to low energy and brain fog.

5. Chronic Stress

Stress affects hormones and sleep cycles.

Over time, it drains your energy reserves.

6. Depression and Anxiety

Mental health conditions often present as fatigue.

This is frequently overlooked.

7. Chronic Medical Conditions

Conditions such as:

  • Diabetes
  • Heart disease
  • Autoimmune disorders

can cause ongoing fatigue.

How Fatigue Is Evaluated

With Dr. Jeffrey Davis, your visit is never rushed.

You can expect:

  • A detailed health history
  • Lifestyle evaluation
  • Targeted lab testing

Patient Story

One patient shared:

“I thought being tired was just part of life. Dr. Davis found a thyroid deficiency. I feel like myself again.”

Why Link Primary Care Improves Your Health

Fatigue workups require time and attention.

At Link Primary Care, you receive:

  • Same-day access
  • Long visits
  • Direct communication

Medical assistants Annette Copeland and Casey Yehling help coordinate care and support patients every step of the way.

You don’t have to live with constant fatigue.

Get more information on our website at linkprimarycare.com

Same-day appointments available—schedule your consultation with Dr. Davis today.

Schedule Your 15 Min Discovery Call