The nose is for breathing and the mouth is for eating. Chronic mouth breathing can lead to many issues including dental crowding, high arched and narrow palate, crooked teeth, and increased anterior facial height. This is because tongue placement is extremely important in guiding the growth of the jaws and the face. Poor soft tissue dysfunction and body posture usually accompanies mouth breathing as well. Correcting resting tongue position, mouth breathing habits, and poor body posture is critical in achieving proper growth of the upper and lower jaws, face, and overall health of a developing child.