The diet for appendicitis should be based on the needs of the condition, determining what can or cannot be eaten based on the response of the gastrointestinal tract. During the acute inflammatory phase, fasting is necessary, and hydration and electrolytes should be replenished through intravenous fluids. If the inflammation is severe, immediate surgical treatment should be undertaken. For chronic appendicitis, soft and easily digestible foods can be consumed, and proactive anti-inflammatory or surgical treatments should be pursued. Post-surgery, it is important to rest in bed and use anti-infection medications timely to prevent infections.