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Hello. Welcome to JustAnswer. I am Dr Z. I'm reviewing your question now, and will post back with a reply ASAP.
Hello and thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 30 years of experience and would be happy work with you, but need a bit more information in order to better assist you if you don't mind.
Is the whole leg swollen or just the paw where he is licking?
If you separate the paw pads and look at the skin, it is inflammed or irritated looking?
Thanks and I will respond further after you reply. There may be a slight delay while I formulate and type a thorough response or I may be offline, but if so, I will respond as soon as I am able.
Thank you for the prompt reply.
That is much more concerning than if just the paw was swollen and can indicate problems with circulation as can be seen in heart disease or diseases that affect the flow of blood to the legs, such as tumors. Arthritis does not usually cause the whole leg to swell. It may be that he is licking due to discomfort from the swelling, but until the cause of the swelling is identified, not much can be done to relieve it. If it is oozing, it may be due to irritation from his licking, especially if it remains moist. You may be able to provide some relief by soaking the foot he is licking in cool water epsom salt soaks.
I hope this is helpful. Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please reply so I can clarify for you.
My posted replies are for general education only and not meant as a diagnosis. Only after a thorough veterinary examination can a diagnosis for your pet be made and specific treatments be advised or medications be prescribed.
You are most welcome.