Two internal conditions that can plague Chis include bladder stones and pancreatitis. Bladder stones are hard, rock-like collections of minerals that have literally stuck together in the bladder. These stones can form due to bacteria (a bladder infection) or the presence of abnormal levels of these minerals due to the dog's diet and her inability to process the contents. Symptoms are the same as for a bladder infection, including straining when urinating, frequent need to urinate, blood in the urine, and expressions of pain while urinating. Bladder stones can be removed surgically or treated long-term with a specific diet.

Pancreatitis is the inflammation of the pancreas, the organ located to the left of the stomach that produces hormones, such as insulin, and digestive enzymes to aid with the metabolizing of food.

The inflammation stimulates a premature release of digestive enzymes, which are supposed to go into the stomach but instead remain in the pancreas and effectively eat away at this organ. Symptoms of pancreatitis include nausea and vomiting, fever, and diarrhea. A Chi's abdomen may be painful and sensitive to touch. In severe cases, the Chi can go into shock and even die. Seek veterinary help immediately.