I took a side picture of our kitties and as you can see the top one has a black chin. We have taken him into the vet twice already for this condition in the past couple of months and was told that he developed an allergy to plastic food and water bowls and to replace them to ceramic or stainless steel. He was also given an antibiotic shot on the first visit along with eye antibiotic ointment. He has had 2 upper respiratory shots prior to this.
At home, we have also scrubbed the area gently with a toothbrush with an antiseptic antifungal shampoo. I also applied a little coconut oil under the chin hoping to draw out toxins. Additionally, we applied the acne pads as recommended by the vet.
During our most recent visit, the vet says not to worry and we have not discovered a solution.
I am looking for answers so that our kitty feels better soon