If this is a normal physiological phenomenon in cats, they will only have a small amount of eye discharge, which is easy to clean with a damp towel. Owners don't need to worry; just continue with daily eye care to protect their cat's eye health. 
If a cat eats food containing oil and salt, it may experience internal heat, leading to increased eye discharge and hair loss. To help, give it more water and a bland diet.
When a cat has severe internal heat, the amount of eye discharge in the corners of its eyes will increase. It's mostly dry and pasty, making it difficult to clean. Before cleaning, you need to moisten and soften the discharge, then gently wipe it away.
When a cat is sick, it will have increased eye discharge, and it may also experience symptoms such as loss of appetite, lethargy, and drowsiness. It is best to treat it promptly after noticing these symptoms to prevent the condition from worsening.
