Question

why cant we eat fish after drinking milk

Answer 1

There is no scientific evidence or study that suggests milk and fish together is a bad combination, says Deepshikha Agarwal, Mumbai-based dietitian and sports nutritionist. It is a myth and several modern recipes and eating habits prove that it not associated with any allergy or skin disease. 

Answer 2

Adverse side effects or white patchy skin has not been reported after eating milk or cream based fish preparations. So it is safe to say that drinking milk, curd, buttermilk or eating milk-based dessert will definitely not cause any white patches on your skin