Can I eat an orange at 10 p.m.?
Generally, it is acceptable to eat oranges at 10 p.m., but consuming large amounts is not recommended. Detailed analysis is as follows:

Oranges are rich in water and vitamins, effectively replenishing nutrients the body needs. Their soft texture makes them easy to digest, placing minimal burden on the digestive system at night. Additionally, the natural sweet-tart flavor of oranges can help relieve nighttime dry mouth or mild hunger. Eating a small amount can provide a sense of satisfaction, and the dietary fiber they contain is unlikely to cause gastrointestinal discomfort, making oranges a suitable light nighttime snack.
When eating oranges at 10 p.m., portion control is important—limit intake to 1–2 segments to avoid excessive sugar consumption, which could increase metabolic strain. Rinse your mouth promptly after eating oranges to prevent residual sugar from damaging teeth. Individuals with weak digestive function or conditions such as acid reflux or heartburn should consume oranges cautiously, as the fruit's acidity may irritate the stomach and intestines. If discomfort such as bloating or acid reflux occurs after eating oranges, discontinue nighttime consumption and opt to eat them during the daytime instead.