Why does a cat tear with blood? - briefly
Cats can have bloody tears due to infections, such as viral conjunctivitis or bacteria, or from injuries like scratches or foreign objects getting into their eyes. Prompt veterinary care is crucial to prevent further complications and ensure the cat's well-being.
Why does a cat tear with blood? - in detail
A cat's tear ducts are connected to a small organ called the nasolacrimal sac, which is located between the eye and the nose. Normally, tears produced by the lacrimal gland drain through the puncta (tiny openings in the eyelid) into the nasolacrimal duct, which then empties into the nasolacrimal sac. From there, the tears are absorbed into the nasal passages and ultimately into the bloodstream.
However, if a cat's tear ducts become blocked or obstructed, tears cannot drain properly and can accumulate in the eye, causing excessive tearing. This blockage can occur due to various reasons such as infection, inflammation, trauma, or the presence of foreign bodies like dust or debris. The buildup of tears can irritate the eye and surrounding tissue, leading to redness, swelling, and sometimes bleeding.
The blood in a cat's tear can come from several sources. One common cause is a scratch or abrasion on the surface of the eye (cornea) due to the presence of foreign bodies or excessive rubbing of the eyes. The cornea has a rich blood supply, and any injury to it can result in bleeding into the tears. Additionally, the conjunctiva, which is the mucous membrane that lines the eyelids and covers the white part of the eye, can also bleed if irritated or injured.
In some cases, the blood in a cat's tear may indicate a more serious underlying condition, such as glaucoma, an infection, or an immune-mediated disease like pemphigus. Glaucoma is characterized by increased pressure within the eye, which can cause damage to the blood vessels and result in bleeding. Infections, such as those caused by bacteria or viruses, can also lead to inflammation and bleeding in the eye. Immune-mediated diseases like pemphigus can affect the skin and mucous membranes, including the conjunctiva, causing ulcerations and bleeding.
If a cat's tears are consistently blood-tinged or if there is any concern about the health of the eyes, it is crucial to consult with a veterinarian. The veterinarian can perform a thorough examination and may recommend diagnostic tests such as a Schirmer Tear Test to measure tear production, fluorescein staining to check for corneal ulcers or scratches, or a tonometry test to assess intraocular pressure. Based on the findings, appropriate treatment can be initiated, which may include antibiotics, anti-inflammatory medications, or surgery to clear any blockages in the tear ducts. Prompt and proper care is essential for maintaining the health and comfort of a cat's eyes.