In life we often find such examples, some patients with hepatitis B onset of epigastric discomfort, nausea, vomiting, anorexia, fatigue, some will have yellow eyes or yellow skin all over the body, there are people with mild symptoms, or even no symptoms at all, it is unintentionally found in the physical examination, and there are a part of the people, hepatitis B quietly come and go, a number of years later, an accidental physical examination only to find that It turns out that they have been infected with the hepatitis B virus. Therefore, if you don’t have any symptoms of hepatitis B, it doesn’t mean that you have never been infected with the hepatitis B virus. Maybe Hepatitis B has visited you before and you just don’t know it. Some people may ask, “Same as hepatitis B, why some are severe, some are mild, and some have no symptoms at all? In fact, in addition to the fact that each patient is infected with a different number of hepatitis B viruses, virulence and mode of infection and other factors, each person’s physical fitness, the state of immune response, all play an important role in the condition of hepatitis B and the course of the disease regression. In other words, whether the symptoms of hepatitis B are severe or not depends on a variety of factors. If the hepatitis B virus is the invading army, then our body’s immunity is the self-defense army, and our body is the battlefield. With different physical qualities, the conditions of the battlefield are different; the conquest between hepatitis B virus and body immunity is the conquest between the invading army and the self-defense army. If the immunity of the patient’s body is normal, that is to say, the self-defense army is strong, then, the hepatitis B virus invading into the blood and liver cells will soon be killed by the immune cells, and the hepatitis B virus released into the blood circulation will soon be neutralized by the antibody with immunity, and surrendered, so that, in addition to the corresponding clinical symptoms of the patient when the liver cells are attacked and destroyed, with the gradual removal of the invading hepatitis B virus, the infection will be terminated immediately, and with the liver cells attacked and destroyed, the infection will be terminated immediately. With the gradual removal of invading hepatitis B virus, the infection will be terminated immediately, and with the repair of liver cells, the condition will tend to be cured and the symptoms will disappear gradually. In this process, if the number of hepatitis B virus is small and the virulence is weak, that is to say, the invading army is completely old, weak, sick and disabled fighters with little fighting power, then the clinical manifestation can be jaundice-free hepatitis. If the number of hepatitis B virus is large and the virulence is strong, that is to say, the invaders are not good, and the self-defense army fights more fiercely with the virus, more liver cells will be damaged, then the clinical manifestation is jaundiced hepatitis. If the body’s immune function is low, or the antigenicity of hepatitis B virus is poor, that is to say, the self-defense army is not strong, the equipment is simple, the recognition ability of the invading virus is poor, and there are fewer personnel, or the invading army is very well camouflaged, and it can not afford to fight a hard battle, but localized fighting may always be present, then it will not be able to cause obvious immune response, and the virus in the body can not be completely removed, and the liver cells are intermittently subjected to certain damage, clinically manifested as mild chronic hepatitis. At this time, if reinforcements are sent to multiply the killing capacity of the self-defense forces, then the enemy can be eliminated. However, if no reinforcements come to the rescue, that is to say, the patient does not get timely and correct treatment, it can also turn into delayed chronic active hepatitis B. If the body’s immune function is imbalanced, the self-defense forces are a group of old, weak, sick and disabled warriors, the virus in the liver cells and the virus in the blood circulation can not be effectively eliminated and controlled, the liver cells will slowly and continuously damaged, liver function fluctuates or deteriorates repeatedly, and the clinic can be manifested as chronic hepatitis and cirrhosis of the liver. If the body’s immune function is seriously imbalanced or super strong, that is to say, the self-defense forces can not self-control or do not listen to the command, tactical blunders, the initial forcing of the enemy, resulting in the body’s specific cellular immune response enhancement, the large number of invasive hepatitis B virus and infected hepatocytes undergo a sharp and strong immune or hypersensitivity reaction, resulting in a large number of hepatocytes necrotic in the short term, and then cellular immune failure, resulting in large pieces of necrosis of the liver and atrophy. Patients may present with coma, bleeding and other complications, i.e., develop severe hepatitis or liver failure. If the body’s immune function becomes tolerant or paralyzed, and the self-defense forces lack the ability to detect and recognize dissidents, they can produce passive idleness and watch the invading forces invade their own homes, but do not listen to the invading forces and allow them to do so, that is to say, although there is the hepatitis B virus replicating in the liver cells, the body lacks the effective immune response and recognition ability, and there is no or only mild damage to the liver cells, then it can manifest itself as a long term chronic Hepatitis B virus carriers, many of them show up as asymptomatic hepatitis B virus carriers, diet, sleep and healthy people are no different, some of them even do not know themselves are hepatitis B virus carriers, often in the physical examination of the occasional discovery.