Mental factors, due to emotional factors, mental anxiety, irregular life, overwork, lack of sleep, and physical exertion greater than intake, will all cause emaciation.

Dietary factors, irregular diet, lack of physical exercise, lack of nutrition, especially the lack of protein ingredients are more likely to cause. Of course, there is pathological emaciation (caused by diseases). The common diseases that lead to emaciation are intestinal parasites, long-term active tuberculosis, anemia, diabetes, hyperthyroidism, malignant tumors, pituitary dysfunction and so on.