The act of inflicting pain or suffering on oneself as a response to perceived wrongdoings.

स्वयं पर दंड लगाना

English Usage: Her self-punishment for the mistake made her feel worse instead of better.

Hindi Usage: उसकी गलती के लिए स्वयं पर दंड लगाने से उसे और भी बुरा लगा।