The reasons why cats can’t open their eyes and shed tears are:

1. If the cat is seriously angry, it will cause inflammation in the eyes and cause constant tears. You just need to adjust your diet appropriately and feed your cat less food that is too high in oil and salt.

2. There are wounds around the cat’s eyes, which may be caused by scratching or being poked by other foreign objects. This can easily lead to congestion and edema in the cat’s eyes. It is recommended to take it to a pet eye hospital for relevant examination and treatment in time to avoid delaying the condition and causing the cat to go blind.

3. If a cat catches a cold, it will shed tears and be unable to open its eyes. It is necessary to feed the cat cold medicine in time, and then take measures to keep it warm to prevent the cold from getting worse and causing fever and other more serious diseases.

4. Infections by viruses and bacteria can lead to increased eye secretions in cats, leading to abnormalities such as being unable to open their eyes. If the situation is not serious, you can use saline to clean the cat's eye secretions, and then instill pet-specific anti-inflammatory eye drops, and observe for a week to see if there is improvement; if there is no improvement after a week or the condition is more serious, it is best to take the cat to the Pet hospital examination and treatment.