This is determined by the physiological function of the liver. The liver receives about 25% of the blood expelled by the heart per minute. Visceral vasoconstriction during light exercise decreases hepatic blood flow, while blood flow to the muscles throughout the body rises during strenuous activity, and hepatic blood flow is even lower, decreasing by about 40 to 50 percent. Hepatic blood flow is increased by about 30% to 40% during bed rest compared to standing. When hepatic blood flow and oxygenation are equal to 50% of the usual level, all hepatic activities can be maintained. Lying down can increase the blood flow to the liver, which can help the repair and regeneration of liver cells. Therefore, patients with hepatitis B must pay special attention to appropriate rest during the acute exacerbation period, especially pay attention to the early rest, to avoid excessive mental labor or heavy physical labor. Hepatitis B patients usually start from the onset of the disease, at least 2-3 months of rest, which is conducive to the recovery of hepatitis B disease. So, what kind of rest is medically required for hepatitis B patients? Is it for hepatitis B patients to sleep in bed and rest all day long? In addition to severe hepatitis B patients need absolute bed rest, general hepatitis B patients should not lie in bed all day long, should be based on the improvement of the condition, slowly increase the amount of activity, especially before meals to get up and move around properly, you can walk around indoors, and later, you can walk outdoors, which is conducive to improving appetite, but after lunch must rest, and should be lying down to sleep for the better, so that more blood flow to the liver, the liver, the liver, the liver and the body. blood flow to the liver to ensure that the liver has enough oxygen and nutrients, which is conducive to the regeneration of liver cells and the recovery of the disease. Don’t sleep too late at night. Hepatitis B patients’ conscious symptoms disappear, jaundice subsides, liver function tests return to normal, this time should be appropriate physical activities, but in the six months after liver function returns to normal, can not participate in heavy physical labor, avoid excessive fatigue, abstain from sexual intercourse. After the condition improves, it is necessary to take full rest and consolidate for one month, and then try half-day light work and regular review. After full-time work, don’t take part in heavy physical labor within half a year, hepatitis B patients should be rechecked every 2-3 months, and if they can insist on working, they should consolidate for another half a year to achieve a complete cure before they can work normally.