Signs of internal organ damage in cats:
1. If it is caused by external force, the most common cause is internal bleeding. Massive blood loss can lead to pale gums, low body temperature, and poor mental state. An ultrasound is needed to determine which part of the bleeding is located.
2. Kidney problems include kidney failure, insufficient renal perfusion, and kidney stones. Clinically, these may manifest as abnormal bloodshot eyes, depression, abnormal urination, and yellow urine.
3. There are no symptoms in the early stages of liver damage, but in the later stages, symptoms such as systemic jaundice, drowsiness, vomiting, and loss of appetite may appear.
4. Common symptoms of cardiopulmonary problems include difficulty breathing, abdominal breathing, and wheezing. Due to insufficient oxygen supply, people often breathe through their mouths and their tongues turn purple. 
Causes of internal organ damage in cats:
1. If a cat suffers internal organ damage from a fall from a height, it may exhibit symptoms such as bleeding and rapid breathing.
2. The internal organs of cats are damaged due to long-term metabolism, which leads to many diseases of the internal organs.
3. It may also be closely related to the cat's diet. Being overweight and consuming offal for a long time can also lead to chronic damage to the cat's internal organs.
