Abstract The external gastric effect of H. pylori is not restricted to the liver. In this study, we will detect this fact through the effect of this bacterial infection on the normal physiological function of the liver. The passive negative effect of Helicobacter on the liver is reflected as hepatitis. Hepatitis causes alteration in the normal physiological function of the liver on different levels, starting from the normal enzyme secretion level to the hormonal level, which is secreted by the liver to regulate the normal function of other systems. The aim of this study was to find this fact by comparing some parameters from the patient (with gastric ulcer) with those of a normal noninfected individual. The parameter is icterus in the patient as a clinical sign that reflected hepatic abnormality and hepatitis detected by a highly skilled clinician. A recent study with a case-control design connected hepatitis and its functional abnormalities in a patient with gastric ulcer who was infected by H. pylori. A total of 382 patients were included as the sample from a community of 60,000 patients in a specific area of Mosul, Iraq. The total population of this city is around 1.5 million. According to a previous study, it is estimated that 0.02% of the city population suffers from gastric ulcers caused by H. pylori. The sample was collected by highly skilled staff along with specialist clinicians. The data were analyzed using SPSS 25 by the specialized staff. We monitored the negative effect of H. pylori on different aspects of infected patients, especially hepatic inflammation and its abnormal physiological function. In this study, icterus is used as a clinical indicator for hepatic abnormalities.