A red, swollen area around your cat’s anus usually points to one of a few common problems: impacted or infected anal glands, parasites causing irritation, or allergies triggering inflammation. Most of these are treatable, but some need prompt veterinary attention, especially if you notice discharge, bleeding, or your cat seems to be in pain.
Anal Gland Problems
Cats have two small sacs just inside the anus, roughly at the four o’clock and eight o’clock positions. These glands normally release a small amount of strong-smelling fluid when your cat has a bowel movement. When the sacs don’t empty properly, the fluid inside thickens, the gland swells, and the area becomes visibly red and uncomfortable. This is called impaction, and it’s the starting point for more serious problems.
Impaction can progress to infection (anal sacculitis), then to an abscess, and eventually the abscess can rupture through the skin beside the anus. A ruptured gland releases greenish-yellow or bloody pus and creates an open wound near the tail. If you see sticky or bloody discharge draining from beside your cat’s rectum, the gland has likely already burst.
Anal gland disease is actually quite rare in cats compared to dogs. A cross-sectional veterinary study estimated the incidence at just 0.4% in cats versus nearly 16% in dogs. Impaction accounts for about half of those feline cases, with infection and abscesses making up the rest. So while it’s not the most common feline ailment, it’s one of the most likely explanations when the area around the anus looks angry and inflamed.
Signs Your Cat Has an Anal Gland Problem
- Scooting: dragging the rear end along the floor or carpet
- Excessive licking or biting at the base of the tail
- Visible swelling on one or both sides of the anus
- Foul smell that’s stronger than normal
- Discharge or a wound near the anus, suggesting rupture
Tapeworms and Other Parasites
Tapeworms are another common cause of perianal redness, particularly in cats that have had fleas. The adult tapeworm sheds small segments called proglottids that migrate out through the anus. Each segment is about the size of a grain of rice. You can sometimes see them crawling near your cat’s anus or on the surface of fresh stool. Once dried, they look like small, hard, yellowish grains stuck to the fur around the rear end.
These segments cause itching as they pass through, which leads to licking, biting, and scooting. The repeated irritation can make the skin around the anus look red and inflamed. If you spot anything that looks like small rice grains near your cat’s tail or in the litter box, tapeworms are the likely culprit. A single deworming treatment from your vet typically resolves the issue, though you’ll also need to address fleas since they’re the most common way cats pick up tapeworms in the first place.
Food Allergies and Skin Inflammation
Food allergies can cause chronic, year-round itching and skin inflammation in cats, and the area around the rectum is one of the places that irritation shows up. Cats with food sensitivities may develop itching around the anus that leads to scooting, frequent bowel movements, or straining to defecate. Some also have vomiting or diarrhea alongside the skin symptoms.
The persistent irritation from loose stools or frequent defecation can keep the perianal skin raw and inflamed. If you’ve noticed the redness is ongoing rather than sudden, and your cat also has itchy skin elsewhere on the body or digestive problems, a food allergy is worth investigating. Vets typically diagnose food allergies through an elimination diet, where your cat eats a simplified diet for several weeks to see if symptoms improve.
How Vets Treat These Problems
For impacted anal glands, a vet will manually express the glands to clear the thickened fluid. If infection is present, the glands may need to be flushed, and your cat will likely go home with antibiotics. Ruptured glands need more involved care: flushing the wound and a course of antibiotics to prevent further infection. In rare cases where the problem keeps coming back despite treatment, surgical removal of the glands is an option.
One important note: don’t try to express your cat’s anal glands at home unless a vet has specifically recommended it. Unnecessary expression can cause scar tissue to form inside the gland, which actually makes future impaction more likely. Expression should only be done when a cat is showing clear symptoms and a vet has confirmed the glands need to be emptied.
Dietary Changes That Help
If your cat is prone to anal gland issues, adding fiber to the diet can help. Bulkier stools put more natural pressure on the anal glands during bowel movements, helping them empty on their own. Plain canned pumpkin (not pie filling) is one of the simplest options. A teaspoon mixed into wet food adds insoluble fiber that increases stool volume. Sweet potato works similarly.
For a more targeted approach, fiber supplements designed for pets use ingredients like pumpkin seed, apple cellulose, or psyllium husk. Psyllium is particularly useful because it contains both soluble and insoluble fiber, meaning it adds bulk while also helping regulate consistency. Your vet can recommend the right amount based on your cat’s size and the severity of the problem.
Signs That Need Urgent Attention
Mild redness with no other symptoms can often wait for a regular vet appointment. But certain signs suggest the problem has progressed to the point where your cat needs to be seen quickly:
- Bloody or greenish-yellow discharge near the anus, which signals a ruptured abscess
- An open wound below or beside the rectum
- Refusal to eat or noticeable lethargy, which may indicate systemic infection
- Straining to defecate with no results, or crying out during bowel movements
- Rapidly increasing swelling that’s warm to the touch
A ruptured anal gland abscess in particular needs treatment promptly. Left untreated, the infection can spread and the wound won’t heal properly on its own.