Fatigue

Fatigue is extremely hard to define, since everybody has their own idea of what being tired means. Everybody is tired once in a while and the most common reason is, of course, lack of sleep. Fatigue can also be caused by a wide range of illnesses and diseases. In such cases, a person usually finds they suddenly need more rest and sleep. This may affect their performance at work. Fatigue is also common when you are feeling down.

Sleep Requirements

The need for sleep can vary quite a lot between individuals, although it is usual to require less sleep as you get older.

• Children

Small children often need a lot of sleep. Toddlers, for example, may need between 18 and 20 hours a day. The need for sleep slowly declines through childhood. Most grade school children will need at least 10 to 12 hours of sleep to be at their best during the day. It does not help children if they are allowed to stay up late and are then hauled out of bed the next morning.

• Adults

Most adults need seven to nine hours of sleep, but this can differ from one person to another different person. A good night's sleep seems to help concentration and improve the immune system, minimizing the risk of illness.

Causes of Fatigue

There are a number of conditions that cause fatigue.

• Anemia - a lack of iron is most often seen in women who have prolonged or heavy periods. Blood is lost every month, which means more iron is needed in the diet.
• Pregnancy
• General bleeding from the stomach or intestines, as caused by ulcers, hemorrhoids polyps, violence, or piles
• A lack of folic acid or vitamin B12.
• Small intestinal diseases or syndromes, such as Crohn's disease.
• Infections
• Glandular fever
• Lyme disease
• AIDS
• Lack of sleep
• Depression