Looking to lead a stronger, healthier life?
Sign up for our Wellness Wire newsletter for all sorts of nutrition, fitness, and wellness wisdom.

Now we’re in this together.
Thanks for subscribing and having us along on your health and wellness journey.

See all Healthline's newsletters »
Let's see if we can figure out what's causing your prognathism.
Select additional symptoms and we'll narrow your results.

What causes prognathism? 6 possible conditions

Prognathism refers to a protruding jaw. It is also called an extended chin or Habsburg jaw. The condition is usually a sign of an underlying condition. Talk to your doctor if you suspect your jaw is protruding. Recognizing Prognathism You have mandibular... Read more

See a list of possible causes in order from the most common to the least.



Gigantism is a rare condition that causes abnormal growth in children. It occurs when your child's body produces far too much growth hormone.

Read more »


Malocclusion of the Teeth

Malocclusion of the teeth occurs when the teeth are not properly aligned within the mouth. In this condition, teeth may not comfortably fit in the mouth without crowding or spacing, or may be twisted or rotated.

Read more »



Acromegaly is a rare hormonal condition caused by an excess amount of growth hormone in the body. It leads to excessive growth.

Read more »



Genetic changes that occur while the fetus is growing can cause disorders that are present at birth. These are sometimes referred to as "congenital disorders." Acrodysostosis is one such condition, albeit a rare one...

Read more »


Fragile X Syndrome

Fragile X syndrome (FXS), also known as Martin-Bell syndrome is an inherited condition. Learn more about symptoms, causes, and treatment

Read more »


Basal Cell Nevus Syndrome

Basal cell nevus syndrome is a group of defects caused by a rare genetic condition. Learn about the symptoms and treatments for basal cell nevus syndrome.

Read more »

This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.