Weight loss is the most important means of dealing with obesity and reducing weight is the only way by which an obese person can revert back to a healthy lifestyle and greatly reduce the tendency of contracting deadly ailments like cancer and heart diseases. But it is also to be pointed out that while obesity is on the rise, in recent times, another common ailment that has been noticed roots from unexplained weight loss. In such cases, without any proper reason or justification a person begins to lose weight rapidly and while many ignore these conditions, it is actually a matter of immense concern and can be symptoms of some grave disease in reality. There can be various causes of unexplained weight loss. Anorexia is the most common form of unexplained weight loss. This is noticed mainly in youngsters. In the world at present external appearance is of vital importance and the fashion industry is replete with ultra-thin models and young children are today often inspired by them. Thus young women mostly indulge themselves in crash diets reducing food consumption and such sudden alteration in diet together with unhealthy dieting contributes to immense weight loss and anorexia can lead to a variety of disorders making an individual extremely weak. In cases when anorexia begins to affect the body adversely, frequent nausea and vomiting are common features and under such conditions the patient must be attended to by [proper medical attention. Certain individuals are born with abnormal rates of metabolism which can affect the digestive organs of the body and therefore it can cause weight loss. Moreover, intestinal parasites are also at times prominent causes of unexplained weight loss as they too affect digestion. High estrogen levels also contribute to unexplained weight loss. It is also necessary to mention here that heart diseases and ailments which affect the lungs are also capable of causing unexplained weight loss.

There are two other very significant factors which can be responsible for unexplained weight loss in an individual. The first in this case is depression. There can be various causes of depression like failure, parental neglects, sexual abuse, emotional deprivation etc. and such factors can drive a person to despair and can affect not only the mental health but also physical health. Under such conditions, unexplained weight loss is very common. Another important factor which can lead to immense sudden weight loss is the contraction of the HIV virus. Diarrhea and gastrointestinal disorders are also capable of causing unexplained loss of weight.