Exams and Tests

Thumb-sucking behavior before age 4 is normal and does not require medical tests or evaluation. Children who continue to suck their thumbs after age 4 or 5 may need a:

• Dental exam, to identify any irregularities of the teeth, bite, or jaw.
• Speech evaluation, if word pronunciations are affected or other irregularities develop.

If the habit is severe and appears to be related to other behavioral disorders, such as anxiety, or a reaction from a traumatic event, a psychological evaluation may be needed.