How do you know when to eat after wisdom teeth surgery?

Generally, fluids are recommended the first day. You can start eating (not chewing) the next day. Start with soft foods (eg: mashed potatoes, yoghurt) and move onto semi-solid foods (eg: cracked wheat, mac & cheese) when you feel comfortable opening your jaw and chewing a little. You should be able to eat normally by the end of the first week. But take care to chew with the front teeth and rinse after every small meal.