Chronic Fatigue Syndrome:
Fatigue is a condition that exists for six months or longer without any explanation and is accompanied by memory or concentration problems. The risk factors for fatigue are unclear, but most occur to women aged 40–50 years and are about four times higher in women than men.
People with fatigue sometimes experience abnormal blood levels of hormones produced in the hypothalamus, pituitary gland, or adrenal gland, but the cause of these abnormalities may also be a thyroid problem.
There is no cure for fatigue but its symptoms are treated and people suffering from it are advised to adopt a healthy lifestyle.