In daily life, we sometimes see cats and dogs shed tears. Is the tears of cats and dogs caused by emotion or eye disease? The specific reason is not very clear. In fact, what causes cats and dogs to shed tears? There are many, and the editor below will introduce six common reasons for you.

1. Ear canal infection

When many people hear this, they will inevitably wonder what the relationship between eye tear stains and ears is. In fact, there is a huge relationship, and it is also the most common cause of tear stains in cats and dogs.

When the ear canal is infected by bacteria, viruses, molds, parasites, or the ears are swollen, painful, or itchy, it will cause cats and dogs to frequently scratch their ears with their hind feet, because the auditory nerve and facial nerve are staggered on the face. , is a very sensitive area, and because the pain in the deep part of the ear canal will extend to around the eyes, it will also stimulate the secretion of lacrimal glands. When too many tears cannot be discharged from the nasolacrimal duct, they will flow from the corners of the eyes near the nose. If the area overflows and accumulates for a long time, the brown tear stains on the hair will become very obvious.

Treatment method: You can ask a doctor to diagnose the cause of the ear canal infection, and then choose the correct treatment method. Do not buy random ear medicines for treatment on your own, which will lead to drug resistance of the ear disease and make it more difficult to treat the condition of the ear. After the treatment of ear canal diseases is completed, tears are no longer secreted vigorously, and you should find that the tear stains will disappear automatically at this time.

2. Nasolacrimal duct obstruction

Because the nasolacrimal ducts of cats and dogs are infected and become inflamed and swollen, causing the entire duct to be completely blocked or incompletely blocked, the tears cannot be discharged from the nasolacrimal ducts normally and will naturally overflow, thus causing Forming unsightly tear stains.

Treatment method: Generally speaking, veterinarians will recommend antibiotic treatment, coupled with minor surgery to unblock the nasolacrimal duct, which should improve the disease; the method and frequency of this treatment will vary according to the severity of the symptoms. It may take several rounds of clearing the nasolacrimal ducts to resolve the problem of nasolacrimal duct obstruction.

3. Entropion of eyelids

Entropion of the eyelids of cats and dogs, also known as inverted eyelashes, will cause the eyelashes to constantly irritate the cornea. This situation will make the dog's eyes feel very uncomfortable, and the dog will frequently scratch its eyes with its forelimbs, which is why it is often seen. They have a teary appearance and can also cause very serious tear stains.

Treatment method: To treat entropion of the eyelids, surgery is usually performed to solve this problem, which is commonly known as "double eyelid surgery". In addition, electric cauterization of the eyelash follicles can effectively solve the problem.

IV. Dacryoadenitis

The main reason is that the lacrimal glands that secrete tears are infected, resulting in abnormal and large amounts of tear secretion. The nasolacrimal ducts have no time to clear so many tears, which leads to the outflow of tears and the formation of unsightly tear stains over time.

Treatment method: The common method is to use drug control. The treatment period depends on the severity of the condition, which may range from five days to four weeks.

5. Genetic problems

Primary polycythemia in cats and dogs is a hereditary disease in which tears are often secreted excessively, thus easily causing tear stains.

6. Special breeds of dogs and cats

This phenomenon usually occurs in short-nosed dog breeds (such as Pug, Shih Tzu, Japanese Dog) or flat-faced cats (such as Persians, Chinchillas), because dogs and cats with such appearance can cause nasolacrimal ducts. The curvature becomes very large, so the amount of tears discharged is limited. Even the normal amount of secreted tears cannot be loaded, resulting in unsightly tear stains or even dark eye frames.