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My 7-month-old Shih Tzu has a mark in her eye. What is it?

Updated on September 23rd, 2025

Pet's info: Dog | Shih Tzu | Female | 7 months old

My 7mth old shitzu have a mark in the left eye, I wonder if is ok natural on this dogs, or if an allergy, eye infection or parasite. Her right eye its ok really withe. Or a friction of the hair on the eye?

1 Answer

Most Helpful Answer

Andrea M. Brodie, DVM

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on March 16th, 2018

This could be an inflammation of the sclera (episcleritis). At this time this does not look very dramatic or like an emergency as I cannot see other swelling which would point to more serious diseases such as glaucoma or an underlying autoimmune disease, however I would make an appointment with a veterinarian for an eye exam soon. It is not possible to diagnose this from a photo, and would need a proper eye exam. The cause of episcleritis (superficial inflammation of the sclera) or scleritis (full thickness inflammation of the sclera) is unknown, however toxins, autoimmune disorders and toxoplasmosis are accepted causes, In severe cases the vet may want to take a biopsy under anesthesia to distinguish between a mass and inflammatory tissue.
Treatment may be necessary and would consist of corticosteroids and/or other immunosuppressants.
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