Hepatitis B nail vertical lines are usually caused by micronutrient deficiency, malnutrition, anemia and other reasons. 1. Micronutrient deficiency: due to the lack of micronutrients in the patient’s body, patients with hepatitis B may have vertical lines on their nails. 2. Malnutrition: due to the malnutrition of the nails of patients with hepatitis B, they may be uneven, which may also cause the symptoms of vertical lines on the nails of patients with hepatitis B to be more obvious. 3. Anemia: due to the damage of red blood cells in the body of hepatitis B patients, resulting in anemia, which causes vertical lines on the nails of hepatitis B patients. There are many reasons that cause vertical lines on the nails of patients with hepatitis B. Patients should consult a doctor in time to clarify the causes under the guidance of professional doctors and carry out scientific treatment.