(Singapore/Malaysian English) Heaty food is food that the Chinese believe can cause an inflamed condition, or make one worse, and should not be taken if you have a cough or sore throat, eg durian, chocolate, spicy food, or fried food. (Times-Chambers Essential Dictionary)
I don't think there is an English word for 'heaty'. The reason, I believe, is that doctors believe a cough or sore throat is caused by germs/viruses, and not by what we eat.