What happens if you eat holly berries?

Eating holly berries can be toxic and lead to symptoms such as nausea, vomiting, diarrhea, and abdominal pain. The berries contain compounds that can be harmful, particularly to children and pets. While ingestion of a few berries might not result in severe toxicity, it's best to avoid consuming them altogether. If someone does ingest holly berries, it's advisable to seek medical attention.