No baby should ever be spanked. In many countries this is even against the law. Spanking a baby is dangerous. Many babies are injured this way every year. Also, spanking seldom works.
Babies are too young to understand, so they don t learn from spanking.
It just makes baby cry more, and it will make you feel bad. Show baby a better way. Your baby may upset you by waking you up at night, crying a lot or messing up his diaper just as you put a fresh one on. He s not smart enough for that. He can t help it, so it makes no sense to get mad at him.