Changes in the liver after 30 days of abstinence from alcohol include liver cells being repaired and liver function being improved. 1. Liver cells are repaired: the main component of alcohol is ethanol, most of the alcohol is converted to acetaldehyde in the liver, which combines with many kinds of proteins to form acetaldehyde-protein conjugate, which has direct damage to liver cells, and further development will cause fatty degeneration of liver cells. After 30 days of abstinence from alcohol, the liver does not need to metabolize a large amount of alcohol, and the damaged liver cells can be slowly repaired. 2. Liver function is improved: the larger the amount of alcohol consumed and the longer the history of alcohol consumption, the more serious the damage to liver function. After quitting drinking, the reduction of alcohol stimulation coupled with the correct liver care, liver function can be improved to some extent, and at the same time also reduce the probability of alcoholic fatty liver, alcoholic hepatitis, alcoholic cirrhosis and other diseases. The changes to the liver from quitting alcohol vary from person to person, and any liver problems require prompt medical consultation.