The solution to the ulcer-like condition on the edge of the cat’s mouth is:

1. During the period of the cat’s mouth ulcer, the owner should not feed the cat dry cat food or some bones. Food to avoid dry and hard cat food that will be difficult for cats to chew and cause irritation to the mouth.

2. Owners of cat ulcers should pay attention to timely solutions. First, find the ulcer on the cat's lips, then gently wipe it with a pet wet tissue to wipe away the dirt on the lips, and then use a cotton swab to wipe it clean. Wet some hydrogen peroxide and apply it to the ulcer to clean it.

3. When a cat suffers from oral ulcers, the owner should pay attention to supplementing the cat with some vitamins, especially vitamin B, which is more important for the cat’s oral cavity.

The reasons why the edge of the cat's mouth looks like an ulcer are:

1. It is mainly caused by the cat being dry and getting angry, and the owner usually takes little care of it. Negligence can cause your cat to develop oral ulcers.

2. Cat lip ulcers may be caused by foreign body stimulation, vitamin deficiency, periodontitis, etc. When treating ulcers, you need to treat the original disease and use antibacterial and anti-inflammatory drugs.

3. The edges of the cat’s mouth look like ulcers, which may be due to the cat being infected with oral inflammation. First of all, when a cat is infected with oral inflammation, it will cause symptoms such as drooling, difficulty eating, weight loss, and listlessness.