Black hard scabs at the corners of a cat's mouth may be folliculitis caused by improper diet or heat. The owner should feed less oily food and take the cat for sterilization if necessary. When cats have severe folliculitis, some antibiotic ointment needs to be given to control the infection. It may also be related to unhygienic conditions. It is recommended that owners wipe the corners of the cat's mouth with pet wipes after eating to ensure cleanliness and hygiene. If there is a trauma to the corner of the cat's mouth, scabs will appear after the wound heals.

How to treat cat folliculitis:

1. First, shave the hair on the area where the cat has folliculitis to prevent reinfection.

2. If the skin has become red, swollen or even damaged, then depending on the degree of folliculitis, topical antibiotic ointment or oral antibiotics may be needed for treatment.

3. When there is secondary infection, such as chin swelling, nodules, rash, scab, etc., you need to go to the doctor for treatment.