Curd is very beneficial for health. But if curd is eaten with anything, it has side effects. In this, if curd is eaten with Udid dal, problems like gas, bloating, swelling, constipation may occur in the stomach. Eating curd with milk can cause problems like vomiting and diarrhoea. Consuming curd with onion can also cause stomach ache, allergy related problems for some. Also do not eat mango, banana, fish, fried food.