Lip rash

My dog suffers from bad allergies mostly all year around. I did an allergy test and got her food allergies under control but environmental can be tricky. Once a year she develops a rash on the sides of her mouth ( She rubs her face a lot) mostly on beds and sofas.  Normally she’s given an antibiotic shot and that takes care of it for the year. However this year it did not clear with a round of antibiotics  (cephalosporins ) and she also received a cytopoint shot but her rash remains. She drools a bit when she’s going to eat something but try and wipe her mouth 3 times a day and clean her bowl daily. Anyways, still no improvement. I’ve tried topical creams and have her in a cone when away but it won’t improve. It’s been almost 2 months.    

Hello!  I wonder what topical creams you've been using, as there are creams and creams. Usually, when a treatment doesn't work, the best thing to do is to go back to the vet.  This will enable them to see that it hasn't worked, reassess the area post-antibiotics and come up with the next plan, which may be a different topical cream or a biopsy.  Assuming that the antibiotics removed any infection, then if you leave it until the area becomes infected again, it may be that the vet gives you another round of antibiotics next time you go and you are no further on.

For this reason, keeping the area clean and another chat with the vet (or phone assessment with eg the nurse)  may be the best way forward.