"The Shih Tzu is a brachycephalic (short-faced) breed. Many Shih Tzu puppies, especially those with very short noses, have slightly pinched nostrils, particularly when they are teething. They may snort and snuffle, snore, and have a watery, clear nasal discharge... This problem generally clears up with age...
Small umbilical (belly button) hernias are quite common in Shih Tzu puppies. If the opening is small, it will likely close by itself as the puppy matures. As with slightly pinched nostrils, many vets unfamiliar with our breed are much too quick to recommend corrective surgery."