The main causes of dog anal redness and swelling include anal gland inflammation, parasitic infection, anal inflammation caused by prolonged diarrhea, etc. First of all, if the anus is red and swollen due to inflammation of the anal glands, you need to squeeze out the anal glands first, and then give the dog anti-inflammatory drugs to treat it. Secondly, if the anal redness and swelling are caused by parasites, targeted internal deworming is required. Finally, if the anus is red and swollen due to diarrhea, you need to solve the diarrhea problem first and apply ointment to the affected area to relieve symptoms.

1. Anal gland inflammation

There is an anal gland in the dog’s anus. If the anal gland is not squeezed regularly, the dog will be very itchy and always want to rub on the ground, which will eventually lead to anal inflammation. Redness and swelling, affecting the dog’s defecation, etc. If not treated in time, severe anal ulcers may occur. In this regard, the owner needs to help the dog squeeze out the anal gland fluid in time, clean the anus, and then apply anti-inflammatory ointment or take oral anti-inflammatory drugs.

It is generally recommended that owners help their dogs express their anal glands once a month. If they are not familiar with the operation, it is recommended to consult a professional pet doctor.

2. Parasitic infection

After a dog is infected with parasites, the activity of the parasites will cause the dog’s anus to itch, so the dog will not be able to bear it at this time. Keep scratching and rubbing the anus to relieve the discomfort. After scratching and rubbing it a few times, the dog's anus will become red and swollen. In this regard, it is necessary to deworm the dog in time. It is recommended that the owner consult a professional pet doctor and choose appropriate specifications of drugs for treatment.

3. Anal inflammation caused by prolonged diarrhea

Dogs are prone to diarrhea and vomiting due to gastrointestinal discomfort, colds, eating foreign bodies or irritating food, and viral infections. Such as gastrointestinal problems, this kind of prolonged diarrhea can also cause anal redness and swelling. If the anus is red and swollen due to diarrhea, you need to consult a pet doctor as soon as possible to determine the cause of the dog's diarrhea, and then use targeted medication to treat it.