Does dragon fruit cause internal heat? Many people are concerned about whether eating dragon fruit will cause internal heat. In fact, eating dragon fruit will not cause internal heat. Dragon fruit is cooling in nature and has the effect of reducing fire. Pitaya has the effect of detoxifying and protecting the stomach. It is a tropical and subtropical fruit. Pitaya is also called fairy honey fruit, jade dragon fruit, etc. It is a plant of the genus Liangtianchi and genus Cactaceae. It is native to tropical Central America such as Brazil and Mexico. .