Why is my dog's back leg swollen with a bump and he's limping?

Thank you for using Petco Pet Education Center, formerly Petcoach! I can see the bump you are referring to in the wrist area. This can be a mass, bone cyst, fracture, or infection of the joint and is likely painful. I recommend having your dog seen by a vet as soon as possible. Your vet can take x-rays to determine exactly what is going on. i hope this helps and that all is well!

This appears to be swelling in the knee joint. What we would consider the "ankle" is much lower in the leg. There can be a pocket of joint fluid on the inside of the leg. It is possible this is a skin lump at the exact spot of this fluid pocket, but I doubt it. I suspect she is not putting weight on the leg because she injured the knee, and now as the swelling increases it is becoming more and more painful. I recommend she be seen by a veterinarian to check the stability of the knee to determine if she ruptured her crainial cruciate ligament or CCL (which is like a human's ACL).

Poor Axel! Because this swelling keeps getting bigger, I would be concerned that it is a cyst, a benign tumor, or a malignant tumor. I'm not sure what medications he was given, but clearly they aren't working if the swelling has gotten bigger. It's also concerning that he has stopped using the leg, not walking properly, and not eating. I would have Axel seen by the vet again today. I recommend having a fine needle aspirate done on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the swelling is found, the vet can discuss treatment options.

Hip dysplasia does not cause lumps or bumps. I would be concerned this is a tumor and I recommend to have her examined. Older dogs (just like people) are more prone to develop lumps/bumps and some of these can be cancerous. Older pets are also more prone to arthritis. Here are links about arthritis and hip dysplasia. https://www.petcoach.co/article/arthritis-degenerative-joint-disease-osteoarthritis-2/ https://www.petcoach.co/article/7-ways-to-manage-your-dogs-arthritis/ https://www.petcoach.co/article/hip-dysplasia-in-dogs-diagnosis-treatment-and-prevention/ I recommend to have Micah checked by the veterinarian and she may need an x-ray. I hope they figure it out quickly.

Please make an appointment to have Tammh seen by a vet as soon as possible. She is likely in pain, and may have a muscular or nerve injury, a fractured bone, a mass, or a foreign body in the leg. Your vet can assess the leg during the physical exam and may recommend x-rays to help determine the cause of Tammh’s limp. Pain medications meant for humans can be very dangerous (and even deadly) for dogs, so I do not recommend giving any to Tammh without consulting with your vet.

I would recommend that Chico get checked out by a vet. There could be lots of causes including a torn ACL, broken bone, sprained ligament, or even bone or soft tissue cancer. After a physical exam, the vet may recommend x-rays to determine what is going on.

This bump on Aspen's leg could be a cyst, a lipoma, a benign tumor, or a malignant tumor. Any suspicious bumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the bump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I would take Aspen into the vet tomorrow to have the bump examined and diagnosed so it can be treated.