Excessive alcohol consumption is one of the main risk factors for nontraumatic femoral osteonecrosis, and the Japanese national survey found that alcohol intake and the number of drinks were positively associated with the incidence of femoral osteonecrosis, showing the cumulative effect of alcohol on femoral osteonecrosis. Some foreign studies have concluded that adults who consume 150L of pure alcohol cumulatively (no less than 400ml or more of alcohol cumulatively per week) can develop the disease. Alcohol-induced osteonecrosis of the femoral head tends to develop bilaterally and is common in adult males aged 30-50 years. However, it is not believed that alcoholic osteonecrosis occurs in all people who drink excessively or heavily, as excessive alcohol intake is only a risk factor for osteonecrosis and not a direct cause. Excessive alcohol consumption is only a risk factor for osteonecrosis and is not a direct cause of the disease. Excessive alcohol consumption combined with the presence of a defect in the body is what causes osteonecrosis, which explains the 5.1% incidence of osteonecrosis due to excessive alcohol intake. Nevertheless, drinking should be stopped in moderation, and “persistent” long-term heavy drinking is damaging to the body even if femoral head necrosis does not occur, so long-term drinkers are advised not to drink more than 2 taels of liquor per day, especially high liquor.