Geliophobia- Fear of Laughter.

The fear of laughing or being around others who are laughing or laugh often. People with this fear feel their teeth are ugly because they have never had any "corrective orthodontic treatment" to their teeth. These people may also force themselves not to smile or laugh, even if they hear something funny, to avoid people looking at their teeth. Though it may seem strange, it is a VERY common phobia compared to some others posted on this blog.