If your betta fish keeps spitting out food, there are a few things you can do to try and remedy the situation. First, check to see if the food is too big for your fish. If it is, try chopping it into smaller pieces. Second, check the water quality. If the water is dirty or of poor quality, it could be causing your fish to reject its food. Clean the tank and change the water regularly to ensure that your betta has a clean and healthy environment. Finally, consult with a vet or experienced aquarium owner to find out if there is an underlying health condition that could be causing your fish to spit out its food.