This happens with many children, and most will outgrow it by age 7 with no intervention at all. If your child is 7, though, you should get some professional help, since a lisp is a hard habit to break as a child gets older.

When should I worry about my child's lisp?

Lisps are very common in children and there are many reasons why they develop. While they are normal in early childhood development, if a child continues to have a lisp by the age of seven, you should seek professional assistance as the longer you wait to treat one, the harder they are to correct.

Can a child outgrow a lisp?

In most cases, a lisp is not developmental in nature, but rather a deviation in tongue placement at rest or during speech (and swallowing). What that means is that the majority of children who are lisping when they start to speak do not grow out of it.