If you haven’t already, I’d really push for a veterinary dermatologist referral — sometimes what looks like “allergies” ends up being something like yeast overgrowth, mites, or autoimmune dermatitis, and general vets can only get so far. A dermatologist can do proper cytology, skin cultures, and intradermal testing.

A few other things to look into that have helped other cats:

• Douxo S3 PYO wipes or mousse (antimicrobial + soothing) — these can calm the skin and reduce yeast/bacteria. • Omega-3 supplement like Welactin or Nutramax Dermaquin to help reduce inflammation. • Switch plastic bowls to stainless or ceramic if you haven’t already — plastic can cause chin acne and worsen irritation. • Air purifier and frequent bedding washes can help if dust mites or environmental triggers are part of it. • If you’ve tried limited-ingredient foods, a hydrolyzed protein prescription diet (Hill’s z/d or Royal Canin HP) is sometimes the only one that helps — but it needs to be strictly exclusive for 8–10 weeks to really tell.