Thai food is well-known as being hot and spicy.
Chilles, for one thing. Phrik Lueng is the hottest chilly around despite its lovely yellow-orange color. Phrik Khi Nu is also potent and Phrik Yuak and Phrik Chi Fa are relatively mild. There are also several important spices. In southern Thailand, turmeric is much used, while many forms of ginger are used with duck, meats. vegetables and soups.