[Etiology and pathogenesis of peptic ulcer].

PU is a disease having many etiologies. The psychological constitutional type, low psychological adaptability and vegetative imbalance are the main causes in the pathogenesis of the disease. Chronic and acute stresses lead to vegetative tone disturbance, immunological imbalance, reduced resistance to HP, hypercoagulation and local blood flow impairment, causing hemorrhage and necrosis in the mucous coat of the gastroduodenal area.