My chihuahua has a marble-sized lump on its back leg. What is it?

Question

Please help me. I just noticed a lump on the back of my 3 year old chihuahua left back leg of his heel. I am worried and sad. It's the size of marble. Idk what it could be please help us!! Pet's info: Dog | Chihuahua | Male | unneutered | 2 years and 11 months old | 5 lbs

Jessica Keay, DVM · Accepted Answer

I am sorry to hear about your concern for Nyte! There are numerous possibilities for this swelling. One of the most common would be a hygroma, which is a fluid filled bursae that we can see often on the elbows and sometimes on the hock of dogs. It is often associated with laying on hard surfaces (some dogs like to lay on hard floors because they are cooler). Other possible causes could include an infection of the joint, a cyst, or a mass/tumor (and some of these are benign/not aggressive). I would recommend a visit to your vet to examine the area. They may recommend a needle aspirate of the swelling, or an xray to help determine the cause. Until your appointment try to provide soft bedding for your dog to lay on when possible to decrease pressure over the area.

My chihuahua has a marble-sized lump on its back leg. What is it?

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