Diarrhoea can have many causes, sometimes it can be caused by an uneven diet of hot and cold, eating undigested food, or bacterial or viral infections.
In mild cases of diarrhoea, dietary guidance can be given first, and relief can be achieved by drinking warm salt water or rice soup. For severe diarrhoea, you need to go to the hospital for examination and give appropriate treatment according to the results to get relief.