The reasons why a cat suddenly sheds tears in one eye:

1. Foreign objects such as hair, dust, eyelashes, etc. enter the cat’s eyes, making the cat feel uncomfortable and shed tears. The owner needs to give the cat eye drops to reduce inflammation and clean the house in time.

2. Cat’s eyes are caused by injuries due to external reasons. If this kind of tearing occurs, the owner can gently open the cat's upper and lower eyelids to see if there are any obvious abnormalities.

3. The cat may have a cold or conjunctivitis. In this case, you need to take it to the hospital for further examination to find out what the problem is, and then treat the cat according to the symptoms. If your cat loves to scratch its eyes, be sure to wear an Elizabethan ring to prevent eye damage a second time.

4. The cat is angry. Many dry foods can cause irritation, and cats will feel uncomfortable if they eat too much. Eating too much hot food can cause your body temperature to rise, which obviously means more tears and more eye mucus. The owner should feed the kitten some light food, such as porridge, millet porridge, fish soup, vegetables and fruits. The owner should also guide the cat to drink more clean drinking water, which can be paired with some trace amounts of food.

What is the disease of cats with tearful eyes

1. Excessive tear secretion or blocked tear ducts.

When a cat’s nasolacrimal duct is blocked, the tears secreted by the lacrimal gland will slip from the corners of the cat’s eyes. Under normal circumstances, tears secreted by the lacrimal gland are distributed on the cornea through blinking and the third eyelid, which can prevent drying and necrosis of the cornea. When something goes wrong, tears will overflow from the inner corners of the eyes.

2. Conjunctivitis.

There are many causes of conjunctivitis in cats, upper respiratory tract infection is the most common condition, followed by conjunctivitis caused by bacterial and viral infections. Of course, allergies, foreign objects, and trauma can also cause conjunctivitis.

To determine whether it is conjunctivitis, just gently open your eyelids and see if the conjunctiva is red. The general symptom is redness and swelling of the conjunctiva, and the cat will have symptoms such as squinting, photophobia, tearing, itching, scratching, and pain.

3. Corneal ulcer.

The normal cornea is smooth and flat. If your cat has a small, bumpy area on its cornea, accompanied by symptoms such as squinting, tearing, photophobia, itching, and scratching, then this is a corneal ulcer.

4. Glaucoma.

When cats suffer from primary or secondary glaucoma, anterior chamber angle dysplasia is the most common cause of primary glaucoma, and other diseases may also induce glaucoma. Acute attacks of glaucoma cause pain, blepharospasm, and tearing. If the pain is so severe that the cat howls, becomes drowsy, or anorexia-like, it may even cause irreversible blindness within 48 hours.

5. Keratitis.

If the cat's eyes are irritated by foreign objects for a long time, such as accidentally entering the hair, due to the carelessness of the owner, the cat's eyes can easily become keratitis. In addition, chronic lack of water can cause irritation, which is also known as keratitisOne of the reasons. Corneal inflammation can occur from random eyelashes, trauma, entropion, or conjunctivitis.