The carcinoid tumor is a type of cancer. It rarely occurs. It develops in the neuroendocrine system of the body. The neuroendocrine system is responsible for the production of different kinds of hormones. That is why When the person is affected with a carcinoid tumor, he will have symptoms due to the presence of the tumor as well as other symptoms that are caused by the hormone it releases into the bloodstream. It is usually present in the gastrointestinal system or lung but can also be found in the breast, ovaries, testicles or kidneys. It usually occurs in people who are 50 years old.

1. Flushing

Around 10% of the people affected by carcinoid tumor will develop carcinoid syndrome. Carcinoid syndrome occurs when the carcinoid tumor produces different types of hormones. Flushing is one of the symptoms of carcinoid syndrome. About 75% of carcinoid tumor patients will experience flushing after doing exercise, being stressed, drinking alcohol and eating certain food as spices and chocolate. However, flushing will gradually start to appear on its own without precipitating factors. The release of histamine may explain the flushing in the carcinoid tumor of the stomach. Histamine is a chemical that causes the blood vessels to become wider, leading more blood to flow to that area. As a consequence, this area will appear red.