Chennai, Feb. 18 -- About

Feeling physically or mentally exhausted after a day's work or after the extra effort you put in into your daily routine, is natural. But if the tiredness or fatigue lasts six months or longer and does not improve with bed rest or worsens after physical exercise or mental exertion, you may be looking at a disorder called chronic fatigue syndrome (CFS).

Chronic fatigue syndrome symptoms could be muscle pain, severe headaches like you have never experienced before, impaired memory or mental concentration, insomnia, painful lymph nodes, sore throat, gastrointestinal problems such as bloating, constipation, nausea, and even, sensitivity to light, noise, alcohol and certain foods.

Unfortunately, the cause of CFS ha...