What is the reason why a cat opens its mouth to breathe? It is necessary to distinguish whether it is physiological or pathological causes.

 10:27am, 16 August 2025

Cats usually breathe with their mouths closed, so when the shoveler finds that the cat often breathes with their mouths open, they need to pay attention. So what is the reason why the cats open their mouths to breathe? If you want to know what a cat means to breathe when opening its mouth, you must first see if it has other symptoms and distinguish whether it is a physiological or pathological cause. Let’s take a look at why a cat opens its mouth and breathe when opening its mouth.

1. Physiological reasons

1. The weather is hot

Because the cat's heat dissipation function is not strong, if the surrounding temperature is high, the cat will dissipate heat through its mouth, thereby opening its mouth to breathe, and sticking out its tongue. At this time, it is recommended that the owner take the cat to a cool and ventilated place in time and provide the cat with sufficient drinking water to avoid heatstroke.

2. Strong exercise

After strenuous exercise, the blood in the body accelerates flow, resulting in insufficient supply of lungs, so there will be a situation where you open your mouth and breathe. Generally, after a while of rest, you will return to normal. However, when the weather is hot in summer, the owner should try to avoid strenuous exercise from the cat to prevent heat stroke.

3. Frightened

Because cats are timid, they are easily frightened. When cats are frightened, they may open their mouths and breathe quickly. At this time, it is recommended that the owner gently caress the cat to soothe its emotions, and try to avoid frightening the cat.

2. Pathological causes

1. Cold

If a cat has a runny nose and sneezing, it may be because of a cold, and its nose is blocked by the snot, which makes it difficult to breathe, so he raises his head and breathes with his mouth to absorb more oxygen. If you find this condition in the cat, it is recommended to take it to the pet hospital for examination and treatment in time.

2. Body damage

① Breakage of the diaphragm

If the cat's diaphragm ruptures, it will cause the cat to breathe, so the cat will open its mouth to breathe, allowing more oxygen to enter the body and maintain the oxygen required by the body.

② The upper palate is ruptured

If a cat falls or is fallen recently, it may also be caused by the fall, causing the upper palate to break, so it is difficult to breathe. You can only breathe with your head raised and your mouth cannot be closed.

3. Suffering from heart disease. For cats with heart disease, blood circulation problems are likely to occur, which leads to systemic hypoxia, which is manifested as opening your mouth to breathe. It is recommended to take the cat to the pet hospital for examination and treatment in time.