It's crucial to take your dog to a veterinarian immediately. They can properly diagnose the cause of the symptoms and recommend the best course of treatment.
Here are some possible causes of scratches and swelling on a dog's cheeks and jaws:
* Allergies: Environmental allergies, food allergies, or flea allergies can cause itching, scratching, and swelling.
* Infections: Bacterial or fungal infections can lead to skin lesions and inflammation.
* Parasites: Mites, fleas, or other parasites can cause itching and irritation.
* Trauma: Bites, scratches, or other injuries can cause swelling and inflammation.
* Dental disease: Infected teeth or gum disease can spread to the surrounding tissues, causing swelling.
* Tumors: While less common, tumors can cause swelling in the area.
Please remember: I am not a veterinarian, and this information is not a substitute for professional medical advice. If your dog has any signs of illness or discomfort, please contact your vet immediately.