My dog's left side of mouth is swollen all of a sudden. It's hard but he doesn't seem to be in any pain. Any ideas?

There are lymph nodes in the corner of the jaw that can swell due to infection somewhere in the dog's system. A foreign object such as a splinter can cause swelling and infection.

Customer: my dog Boxer 57 lbs has a sudden swollen neck. The bottom is soft and squishy. Also swollen on top but harder. I just gave her Benedrel. She does not seem to feel bad she is still …

Customer: My dog is experiencing a sudden onset of pain behind the right ear at the neck and winces and wines when touching this area. Similar to where a human might have a swollen …

Customer: My dog has a sudden large lump in her neck and swollen jawline Veterinarian's Assistant: I'll do all I can to help. When did you first notice the dog had this lump? Customer: …

Customer: Approx 4 to 5 weeks a go my dog had a swollen lymph node on his neck with the opposite one being slightly swollen. He was put on antibiotics and they both went down. A …

Customer: her Neck is all of a sudden pretty swollen. We don’t see anything that could have cause the issue, like a bit or something stuck or anything. I’m thinking it might be her lymph …

A few things could be going on that can cause the swelling in a dog Snyder's age. That swelling is in the area of one of the lymph nodes in the neck, so it could be some kind of infection- in his …

Customer: I noticed my dogs neck is severely swollen and sagging. There’s also dried up blood on her neck. I dont think it’s a bee sting. It had to have happened last night or late afternoon. I …

Certain cancers can develop on the head causing swelling in a specific area. Swelling under the jaw may be a swollen lymph node. Inflammation of a muscle is another possible cause for a …