You can drink water before, during and after your meals. There is not good or bad time for water, after all water is the life source of our body. Many people say that you shouldn't drink water while your eating. This is mainly because water might fill your stomach and you might not be able to eat properly. But there is nothing harmful about and you need not worry if you have a good appetite. Sometimes food can get stuck in your throat and you might need water to push it down. This usually happens if you don't chew your food properly.