Worrying lump under my cat's jaw

Thank you so much for your replies. It’s a relief to know that the out-of-hours vets are still open. For the time being, I haven't noticed any change in my cat’s condition. I’m just waiting to see how things go...

Hi there, Sudden swelling under the jaw could indeed be a sign of an allergic reaction to something like an insect sting, but it’s not the only possibility. You should get your cat to a vet as soon as possible to prevent the lump from getting any bigger and to make sure their condition doesn't worsen. Don't worry, as of today, Sunday 15/03/20, even with COVID-19, emergency vets remain open to ensure essential care is provided in the best possible conditions. Take care. Caroline - Veterinary student at the Alfort National Veterinary School (EnvA). Project Manager for ProVéto Junior Conseil, the EnvA student consultancy. http://proveto.net/

Evening, I think the emergency vet is definitely called for here... If it really is a sting, he seems to be having an allergic reaction. If the swelling gets any worse, there’s a real risk it could block his airway! The measures in place to stop the spread of the virus don’t prevent healthcare services—whether for people or pets—from carrying out their work in an emergency.