Sudden Fatigue

• Fatigue is one of the most generic symptoms reported by patients. The symptom can be an indicator of a myriad of diseases, often making it difficult to diagnose the correct ailment. In many cases, fatigue is not even linked to an ailment, but rather is caused by lifestyle or psychological problems. Typically a patient must identify additional symptoms in order for a doctor to narrow down the potential underlying causes. If you've already noticed that your fatigue hits you quickly, then that's a good first step towards identifying the cause.
  
  

Lifestyle

• Stress, lack of sleep and over-exertion are just a few of the lifestyle factors that can lead to sudden fatigue. Alcohol use and abuse have long been linked to fatigue. Drinking caffeinated drinks can sometimes be great for a quick pick-me-up, but when the caffeine wears off, sudden fatigue can occur. Sugar can have the same effect. Not surprisingly, poor sleep habits can cause sudden fatigue as well. In general, lowering stress, eating healthier and getting a good night's sleep are all possible ways to eliminate sudden fatigue.
  
  

Psychological Problems

• Sudden fatigue is a common symptom poor mental health. Grief and depression are the most common psychological issues that can result in fatigue. While these issues typically result in dull fatigue throughout the day, sudden onset fatigue can also occur. Antidepressants and other medications may help improve mood and fatigue.
  
  

Psychological Problems

• A number of medical problems are linked to sudden fatigue. Chronic fatigue syndrome is a unique disorder fatigue, along with flu-like symptoms, pain in the joints (without swelling) and muscle pain. Disorders that result in poor sleep, such as restless leg syndrome and sleep apnea can fatigue. Anemia, acute liver failure and kidney failure are also common ailments linked to extreme tiredness. Other possible causes include thyroid disorders, cancers and diabetes.