Siento -
Expressing sympathy (e.g., "I'm sorry for your loss") or apologizing for a mistake that caused real emotional impact.
Minor physical accidents like bumping into someone or asking to pass through a crowd. In those cases, use "perdón" or "disculpa" . 2. "Siento" vs. "Me siento"
"Lo siento" (literally "I feel it") is a used when you genuinely feel bad about a situation.