What are the possible causes of whole-body itching?

Itchy skin may be related to physiological factors or pathological conditions. Physiological causes include seasonal changes, prolonged lack of bathing, infrequent clothing changes, and wearing excessive synthetic fiber clothing. Pathological causes are primarily associated with medical conditions such as eczema, urticaria, and contact dermatitis. Physiological causes may not require medication but should be addressed through timely self-adjustment. Pathological causes require drug treatment; however, appropriate medications should be selected based on the underlying cause. It is recommended to seek medical attention at a hospital as soon as possible.