How is it that the dog's tears are red?

Those are tears. \x0d\\x0d\ may be caused by the following situations: \x0d\ 1. Ear canal infection \x0d\ When the ear canal is infected by bacteria, viruses, molds and parasites, or when the ear is swollen, painful and itchy, dogs will frequently scratch their ears with their hind feet. Facial nerve and facial nerve crisscross, which is a very sensitive area. Because the pain deep in the ear canal will extend around the eyes and stimulate the secretion of lacrimal glands, when too many tears cannot be discharged from the nasolacrimal duct, they will overflow from the corner of the eye near the nose. Over time, the brown tears on the hair will be very obvious. \x0d\ 2。 Obstruction of nasolacrimal duct \x0d\ The nasolacrimal duct is inflamed and swollen due to infection, resulting in complete or incomplete obstruction of the whole duct, so tears can not be discharged from the nasolacrimal duct normally, and will naturally overflow, thus forming ugly tear marks. \x0d\ 3。 Eyelid entropion \x0d\ Eyelid entropion, also known as inverted eyelashes, can cause eyelashes to irritate the cornea all the time. This situation will make the dog's eyes feel very uncomfortable, leading to frequent scratching of eyes with forelimbs, so it is often seen that they cry, which will also cause very serious tear marks. \x0d\ 4。 Lacrimal adenitis \x0d\ is mainly caused by the infection of lacrimal gland that secretes tears, which leads to abnormal secretion of tears. The nasolacrimal duct has no time to dredge so many tears, which will lead to the outflow of tears and the formation of ugly tears over time. \x0d\ 5。 Hereditary disease \x0d\ Primary hyperdacryosis is a hereditary disease, and tears are often secreted too much, which is easy to cause tear marks.