why does my chihuahua has watery eyes
Does your dog have Бtear stainsБ on his fur? Have you ever wondered why? In order to understand excess tearing, itБs important to first review a little physiology 101. What do tears do? Tears perform a number of important roles: they lubricate the eye, provide a smooth optical surface, have antimicrobial properties, provide nourishment, and wash away debris. Baseline tears are produced at a constant rate, primarily to keep the eye lubricated. Reflex tears are triggered by any noxious stimulus, such as allergies, infections, foreign materials, hair, and even dryness. What causes excessive tearing? Increased production Increased production of reflex tears may occur at higher volumes to БflushБ an irritant away. In some animals, excessive tearing can be due to this increased reflex tearing. Impaired drainage When excessive tearing is caused by impaired drainage, it is called epiphora. Tears normally drain via the tear ducts and ultimately empty into the nose. If there is a blockage anywhere along the course, tears will overflow. So why does the lacrimal drainage system become blocked? Blockage can occur due to trauma, medications, and rarely tumors. In certain
of cats and dogs, the problem is their anatomy. Breeds with flat faces (brachiocephalic) such as, and, can have epiphora due to their flattened facial anatomy. below their eyes and may have other findings based on the underlying problem.
If the tearing is chronic, animals develop a reddish brown stain below their eyes. The area may also be moist and their may become red and irritated. If you think your pet has excessive tearing, you should take them to your. Your veterinarian will determine if your pet has an underlying eye problem causing reflex tearing or a lacrimal duct obstruction. Excess tearing from conditions such as an infection, corneal abrasion, or foreign bodies are painful and need to be treated immediately. If the problem is from lacrimal duct blockage, the obstruction will have to be addressed. Your veterinarian will do a thorough eye examination to look for the underlying cause. They will also likely use fluorescein to evaluate for corneal abrasions or ulcers and to determine if tears are draining appropriately into the nasal cavity. The treatment depends on the cause of excess tearing. If the problem is reflex tearing, the underlying trigger needs to be addressed. In and, misdirected hair or (trichiasis) is a common problem but the trigger could be allergies, medications, or an. If the problem is blockage of the lacrimal drainage system, the ducts may need to be flushed or the obstruction cleared with a surgical procedure to open the ducts. Remember, excessive tearing can be due to a serious underlying eye problem. So before you attempt any home remedies to address the tear staining on your petБs fur, be sure your veterinarian evaluates your pet.
There are no home remedies that have been proven to be 100% effective and some may actually be harmful to your petБs eyes. Before you attempt to use any products around your petБs eyes, speak with your veterinarian to make sure they are safe for your pet and appropriate for their particular condition. If you have any questions or concerns, you should always visit or call your veterinarian -- they are your best resource to ensure the health and well-being of your pets. Epiphora is a condition that causes an abnormal overflow of tears. Causes of epiphora due to the shape of the eyes is seen in many breeds. The overproduction of tears can be congenital due to distichiasis turning in of the eyelashes, or entropion the turning in of the eyelid. Young shelties, shih tzus, Lhasa apsos, cocker spaniels, pekingese, bulldogs, dachshunds, and miniature poodles are most commonly affected with distichia. Entropion is most commonly seen in some Chinese shar peis, pugs, mastiffs, poodles, Labrador retrievers and chow chows. The upper or lower lid may be affected. This condition may occur secondary to eye irritation. Epiphora is evident with the observation of an overflow of tears, tear drainage and/or staining on face. Other signs include: Congenital abnormalities include the occurrence of too large an opening of the eyelids, causing increased exposure of the eyeball in brachycephalic breeds.
Ectropion, a turning outward of the eyelid, is commonly found in Great Danes, bloodhounds, and spaniels. Entropion is seen at birth in some breeds and can be acquired due to post-traumatic eyelid scarring and facial nerve paralysis. Conditions acquired by a dog can lead to epiphora. These conditions include rhinitis/sinusitis, which causes swelling adjacent to the tear drainage system; trauma or fractures of the bones in the face; foreign bodies in the eyes (e. g. , grass, seeds, sand, parasites). Tumors of the third eyelid, the conjunctiva of the eye, eyelids, nasal cavity, maxillary bone in the face, or in the sinuses located around the eyes will also be considered. A condition which causes the nasolacrimal duct (tear duct) to be obstructed, whether through inflammation due to an acquired condition, or because of a congenital abnormality, may also cause an overflow of tears. Blockage of the nasolacrimal drainage system can be caused by congenital lack of normal openings on the eyelids into the tear drainage system, as seen in cocker spaniels, bulldogs, and poodles. Extra openings can also form into the tear drainage system in abnormal positions, such as openings along the side of the face below the corner of the eye, closest to the nose. Other possibilities include lack of openings from the tear drainage system into the nose. Acquired conditions involving corneal or conjunctival foreign bodies are seen usually in young, active, large-breed dogs.
Inflammation of the eyelids and conjunctiva can be due to infectious or immune-mediated causes. Disorders of the cornea are characterized by the presence of scratches/ulcers with or without inflammation. Inflammation of the front part of the eye, including the iris, can be present. Glaucoma is a condition in which the pressure within the eye is increased. Eyelid tumors are typically seen in older dogs of all breeds. Your veterinarian will perform a thorough physical exam on your pet, taking into account the background history of symptoms and possible incidents that might have precipitated this condition. Your veterinarian may order radiographs to check for lesions in the nose or sinus area, and contrast material may be used to help differentiate structures. Your doctor may also order a magnetic resonance imaging (MRI) or computed tomography (CT) scan. In addition, a culture of the material in the eyes will be taken for laboratory analysis. However, surgical exploration may be the only way to obtain a definitive diagnosis. A flushing of the tear ducts may be sued to dislodge any foreign material. If irritation is evident, your veterinarian may also employ the use of a fluorescein stain, a non-invasive dye that shows details of the eye under blue light, in order to examine the eye for abrasions or foreign objects.
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