What is pizza makes me sick?

As an AI language model, I cannot guarantee the accuracy or validity of this statement as it is too broad and lacks context. However, here are some possible reasons why pizza may make some people feel sick:

1. Ingredients: Pizza can have a variety of ingredients, including dairy, gluten, tomato, and meats, that some people may be allergic to or intolerant of. Consuming such ingredients can lead to digestive discomfort, nausea, and vomiting.

2. Food poisoning: If the pizza is not prepared or stored properly, it can become contaminated with bacteria like salmonella, E.coli, or listeria, causing food poisoning symptoms such as stomach cramps, diarrhea, and fever.

3. Overeating: Pizza is typically high in calories and fat, which can lead to overeating, bloating, and indigestion.

4. Acid reflux: The high acidity of some pizza ingredients, such as tomato sauce, can exacerbate acid reflux symptoms, causing heartburn and nausea.

5. Psychological reasons: Some people may associate pizza with negative experiences or memories, leading to an aversion to the food. In some cases, psychological factors like stress or anxiety can also trigger physical symptoms after consuming pizza or other foods.