Accidentally drinking expired milk, if you don't drink too much, there should be no big problem, and it won't affect and hurt your health, so don't worry too much.

However, if you drink a large amount, you need to observe it for 3 to 5 hours. If there are no symptoms, there is no problem. If there are adverse reactions of food poisoning such as abdominal pain and diarrhea, it is recommended to go to the hospital for medical treatment.