Severe fatty liver can be reversed with aggressive and correct treatment. Usually fatty liver is a reversible disease and most cases of severe fatty liver improve with treatment. However, if fatty liver continues to progress, it may develop into fatty liver cirrhosis, which cannot be fully reversed or return to normal. Fatty liver needs to be treated aggressively even if there are no symptoms. The average patient can improve the disease and eliminate the triggers by increasing exercise, controlling diet, and taking medications. General patients who have severe fatty liver caused by drinking and diet should stop drinking and adjust their diet in time. If severe fatty liver is caused by medication, the medication should be stopped in time. Usually fatty liver is often combined with some systemic diseases, patients should be treated as a whole, actively exercise and prevent other complications. If patients have severe fatty liver, they should actively consult the doctor and follow the doctor’s instructions to avoid delaying the condition.