[header] How to cope with having a lisp [title] Notice if your tongue protrudes between your two front teeth. [step] This is called an interdental lisp. When you have this kind of lisp, you make the " th " sound for " s " and " z " sounds in words when you speak. 
Interdental lisps often occur in young children and can be corrected if caught early enough. [title] Check if your tongue touches your two front teeth.