Eating undercooked pizza carries minimal risk if the toppings are safe, but some concerns depend on what's underneath. If the dough is simply underdone (doughy, pale, underproofed), the main issue is digestive discomfort—it may sit heavily in your stomach, cause bloating, or lead to indigestion. Raw dough itself isn't toxic. However, the bigger risk comes from toppings. Undercooked meat toppings like sausage, ground meat, or pepperoni can harbor harmful bacteria such as E. coli, Salmonella, or Listeria, which cause food poisoning with symptoms like nausea, vomiting, diarrhea, and fever. Cheese and vegetables pose minimal risk. Undercooked pizza with only plant-based toppings or fully cooked meats is relatively safe. The severity of any illness depends on your immune system, the specific pathogens present, and contamination levels. Most people who accidentally eat slightly undercooked pizza experience no symptoms. If you're concerned, monitor yourself for gastrointestinal symptoms over the next few hours. Severe symptoms, bloody stools, or persistent illness warrant medical attention. To prevent this, ensure meat toppings reach safe internal temperatures (160°F for ground meat, 165°F for poultry) and that the entire pizza is heated through properly.