Eat tomatoes after red feces is not necessarily normal, raw tomatoes, eat tomatoes too much, eat other foods that contain more red pigment or digestive bleeding and other cases of our feces can be red. 1. The human body is not easy to absorb tomatoes in the trans configuration of lycopene. When lycopene is heated, it is easy to change to the cis configuration that is easily soluble in fat, and becomes easy to be absorbed by the body. When raw tomatoes are consumed, lycopene is not easily absorbed by the body and the feces may appear red, which is a normal phenomenon. 2. When more tomatoes are consumed, too much lycopene is excreted without being absorbed, and the feces may appear red, which is normal. 3. It is normal to have red feces when you eat tomatoes and foods rich in red pigment, such as red dragon fruit. 4. In case of gastrointestinal bleeding, because of the presence of red blood cells or hemoglobin in the feces, the feces will also appear red, so be careful not to ignore the internal abnormal bleeding symptoms due to the consumption of tomatoes. If you have red feces, you should go to the regular hospital as soon as possible to clarify the cause, to avoid delaying the best treatment time.