Is your dog on any HW/Flea/Tick prevention? Pet store brand or from the Vet? and/or if yes, changed recently or as something new added? If yes - What are you using? Was your dog recently vaccinated?
And why the harsh antibiotic for a possible allergic reaction...abx. are for bacteria, not to treat lumps and rashes of unknown origin. Treat the face topically with Vetrycin or organic apple cider vinegar/water mix (50/50 solution). Did you ask your vet if Temeril P would cure this issue and if no, then why is it scripted? Why not amoxicillin?
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion. - Unknown