Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
Is this golf ball type lump hard, soft, firm, or fluidy?
Is it to one side of the jaw?
Any wounds or risks of snake bite?
Are her gums pink or pale/white?
Can you take a breathing rate for me (just count her breaths for 10 seconds + multiply that by 6)?
Can you take a photo of this? If you can do so and post them online, it will let me see what you are seeing. To post them, you can either use the paper clip on the tool bar. Or if you cannot see that on your phone/computer, then you can post them on any site (ie Flickr, Photobucket, Imgr etc) and paste the web address here for me to have a peek.