Experienced and professional animal trainer provide their insights in answering this question :
A. Sounds like abscesses maybe or an allergic reaction. See your vet to determine what is going on. Without being able to see it I couldn’t determine what is going on.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Many of the same problems that can cause bleeding or smelly fluid to leak from a cat`s anus can also make it swollen. These include impacted anal glands (glands that can`t drain normally), anal gland adenocarcinomas, anal gland abscesses, and rectal prolapse.
Lymphadenopathy can affect cats at any age. It is a reaction in the lymph nodes that can be caused by a virus, inflammatory condition, vaccine reaction, tick-borne illness, cancer, or other infection.
The most common reasons for the appearance of a lump or bump include: Abscess – Due to infection, skin irritation, imbedded foxtail. Benign growths – Includes skin tags, fatty tumors, cysts, warts. Parasites – Cuterebra larvae, ticks, lesions from fleas, ringworm, mange.
Bumps in pets tend to fall into one of the following categories: An infection or abscess. A reaction to something foreign in the body (also called a granuloma) A tumor (either benign or malignant)
A swollen cat cheek could be a result of various things. It may be an abscess, a cyst, or a tumor. Of course, it also might be a tooth problem. Best to get to the vet soonest to check it out.
Some cats develop a firm, non-painful lump under the incision. This is inflammatory tissue forming around the suture buried under the skin. This will go away by itself in 2-3 weeks.
If any new lumps appear on your cat, you should take them to your vet to get checked. There`s no way of knowing if a lump is cancer just by looking at it so your vet may need to run tests.
Swollen lymph nodes, severe or minor, can occur due to any illness in people and cats alike. However, inflamed lymph nodes in cats are much more common due to severe illness. Generally, cats with swollen lymph nodes feel poorly and will likely be lethargic and depressed.
A minor injury can cause a bump. It may heal on its own, but it could get infected. A cat that`s been given a shot may have a lump for a few days, too. But if it doesn`t go away after that, call the vet.
All dogs and cats can get sebaceous cysts, whether purebred or not. The cysts look like enclosed small bumps that stay whitish in color and are raised from the skin. When touched, they feel like small circular or oval lumps under the skin. If your pet has a sebaceous cyst, you will notice a raised bump.
The hernia generally appears as a soft swelling beneath the skin and it often protrudes when the cat is standing, meowing, crying, or straining. “Some hernias are reducible, meaning that the protrusion can be pushed back into the abdomen.”
Fatty tumors, called lipomas, may show up anywhere on a cat`s body. They aren`t cancerous and don`t need to be removed unless they keep your cat from getting around well. They`re seen more often in older or overweight cats. To check a lump for cancer, your vet will use a needle to get a sample.
Fluid-filled lumps in cats can occur for several reasons, including cysts, abscesses, tumors, fibromas, lipomas, acne, and more. If you notice a lump on your cat, it`s important to schedule an appointment with your vet to diagnose it and learn about treatment options.
Basal cell tumors are the most common skin tumor in cats and dogs. These tumors can begin as benign growths but, if left untreated, can become cancerous. Look for a lump on their head, neck, or chest that is a different color than their skin — it may be a basal cell tumor.
Lipomas: These are benign fatty tissue growths that are usually felt under the skin around the abdomen, flank, or neck of a cat. They do not tend to grow from the skin itself, but underneath the skin, in the subcutaneous tissue. These tend to be slow-growing, non-painful tumors.
It is normal for stitches or staples to cause a small amount of skin redness and swelling where the stitch or staple enters the skin. Your wound may itch or feel irritated. Check your wound every day for signs of infection.
It may take 5 to 7 days for the swelling to go down, and 10 to 14 days for the bruising to fade. It may be hard to eat at first. If you have stitches, the doctor may need to remove them about a week after surgery. It will probably take a few months for you to heal after surgery.
A simple lipoma is a fatty lump that forms under the cat`s skin. Lipomas in cats are not very common but they can form on various parts of the body, typically in cats 10 years of age or older. While a cat may have one or more lipomas, they do not spread, they tend to not grow very large and they are not painful.
See a GP if:

your lump is painful, red or hot. your lump is hard and does not move. your lump lasts more than 2 weeks. a lump grows back after it`s been removed.

Sebaceous cysts in your cat are benign, harmless, and noncancerous fluid-filled sacs. These sacs occur when a hair follicle becomes damaged or clogged in your cat`s skin.
Most swollen lymph nodes aren`t a cause for concern and will go away as your infection clears up. Healthcare providers usually only worry about swollen lymph nodes when they enlarge for no apparent reason.
Cancerous lumps in cats are not always soft or hard — Some can be hard and others soft, while others also change from soft to hard with time. Cancerous lumps in the cat have one thing in common, they spread quickly in other parts of their body.
Veterinarians refer to a fatty layer that concentrates into a nodule under the skin of cats as feline panniculitis. Panniculitis occurs when the insulating fatty layer under a cat`s skin becomes inflamed, causing bumps or nodules to form. These nodules may be soft or firm.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Hi, I have a kitten approximately 6 weeks old, and i’ve noticed swelling around all of her claws, and two knots at the end of her tail…Why.
ANSWER : A. Sounds like abscesses maybe or an allergic reaction. See your vet to determine what is going on. Without being able to see it I couldn’t determine what is going on.

Read Full Q/A … : Taking Care of Kittens

Q. I have a 1yr old male 38 lb Labradoodle and my gf just brought a month old kitten home. Can they interact? If not, for how long?
ANSWER : A. Interactions whenever a new pet is brought into the house should start off slow, then can be increased in time. The best steps when introducing a new cat is to allow your cat or kitten to have a room in the house all to him or herself. Allow your dog to sniff under the door to get used to the kitten’s scent, and even show your dog articles such as bedding the cat has slept on. After a few days, an introduction with your dog on leash, or a barrier such as a gate where both pets can look at each other but not see each other is best. This will allow each to get used to seeing the other without the ability to jump, bite or scratch the other. Once the two are used to this, then a face to face interaction can begin. If at any time a fight or scuffle breaks out, separate the two pets and try again at a later time. The amount of time this introduction takes can vary depending on how the two react to each other.

Until your kitten is older, or you are sure both are fine together, do not leave the two pets together unattended. Even a well-meaning and playful dog can accidentally break a leg of a kitten or worse without meaning to! A safe room for your kitten to be in while you are away, or a barrier to allow your kitten to escape to safety if needed will help until both are big enough to play alone safely.

Read Full Q/A … : Dogs and Jealousy

Q. I recently added a new 2 month old female kitten to my house and my male 5 month the old kitten has turned aggressive and chases the kitten down..
ANSWER : A. It is possible it could be play behavior but without seeing it in person, hard to say. Is the male kitten neutered? You may want to consider doing so. Also, try re-introducing the kittens slowly by creating a safe space for the new kitten behind a closed door in a room. Keep her there for at least a week so she is protected but your male is still able to smell her. After a week or 2, you can then graduate to using a baby gate so they can then not only smell each other but safely see each other as well. If that is going okay, after another few days you can bring the gate down. Also, be sure to have feeding bowls in separate locations and at least 2 litter boxes.

Read Full Q/A … : Ragdoll Cats

Q. What would cause sudden swelling around the outside of my dog’s mouth
ANSWER : A. Several things could cause it, but two things are more common than others. It could be some type of allergic reaction to something that’s new in the environment – the skin around the mouth is pretty sensitive to things like that, and sometimes allergic reactions will result in swelling in that area.

The other possibility is some type of insect sting. Bees are really common culprits here, and dogs are famous for biting at them and getting stung. Hopefully it’s not too serious, but do monitor for continued swelling and take her in if you see anything concerning, especially difficulty breathing or signs that the reaction is becoming more generalized (swelling or focal “wheels” in other parts of the body).

Also I’ll just mention that I’ve seen dogs get bitten by snakes in the area around the mouth, so if you live anywhere where that’s a possibility this time of year, definitely go right in to see a vet ASAP.

Q. My new kitten who is 8 weeks old has a lot of gas. I have bee feeding her kitten chow & fancy feast wet food,
ANSWER : A. Try to give her boiled chicken or buy good quality food for kittens. You should start a new diet gradually by mixing it with old food ( 1/4 new : 3/4 old for couple of days, 1/2:1/2….) You can add to food some probiotic for cats. You can also give her some symeticon for babies to relief the symptoms. See your vet if it won’t help or you will notice vomiting or diarrhoea.

Read Full Q/A … : Kitten Food

Q. i believe my cat is pregnant but showing signs of being in heat
ANSWER : A. Cats are induced ovulators, meaning they will continue to go into heat until they are bred, or spayed (reproductive organs removed). If your cat is showing signs of being in heat (excessive yowling, presenting her rear to you for inspection, attempting to get out or other cats hanging near your house) and you don’t want kittens, it is best to have her spayed. Most cats are also semi-seasonal in their heat cycle meaning they will more likely be in heat through Spring-Summer than in Fall-Winter.

Pregnancy in cats lasts about 60 days. Signs of pregnancy may include weight gain, increased appetite, nipples that become pronounced or “leak” and seeking nesting areas to deliver kittens. If you saw that your cat was in heat, or had her mated, you can use the date she was bred to determine when she may be due for kittens. Your local vet can help determine if she is indeed pregnant and can also take an X-ray to determine the number of kittens present if your cat is nearing her due date. Be sure to feed mom a kitten formula in the last few weeks of her pregnancy and during nursing as it will help provide extra beneficial nutrients for both mom and babies.

If you do not want kittens, some very early term pregnancies can be aborted with spaying, otherwise spaying mom is usually done when kittens are weaned from their mom.

Q. I have a 9 week old kitten. At what age do they start spraying? We have a 12 yr old cat that has sprayed a door, I think. Could it be the kitten?
ANSWER : A. It is not unusual for an established house cat to start acting out once there is a change in his environment. In this case, the new kitten could be a stressor for the older cat as he tries to get used to the new change of an added house member. To answer your question, cats generally do not start spraying until the are around 5-6 months old.

Q. I have two 3 week old kittens that I am bottle feeding. The kittens both have diareaa and there buts are red. Is there anything I can do ?
ANSWER : A. Diarrhea in kittens can be caused by many things, including intestinal parasites (very common in kittens), wrong formula, recent changes in diet (from queen’s milk to formula or from one formula to another), and other gastrointestinal upsets. Their bottoms are likely red and irritated from the diarrhea soiling the fur and skin, trapping moisture against the skin and serving as a breeding ground for bacteria. First, stop feeding the formula. Second, collect a fecal sample to be analyzed by your veterinarian for intestinal parasites. Third, call your vet and make an appointment as soon as possible, ideally the same day. Diarrhea in kittens is serious business and can lead to death from dehydration and loss of nutrients. Finally, in place of formula give an electrolyte replacement solution (like Pedialyte for infants/children) – plain, no flavors, no colors – for at least the next 1-2 feedings. This is not the same as a sports drink. After the 1st or 2nd feeding of straight electrolyte replacement solution, start to add formula back into diet at 1/4 strength ( 1 part formula to 3 parts water), The following feeding mix 2 parts formula to 2 parts water. Then, 3 parts formula to 1 part water. Finally, offer full-strength formula. If the diarrhea continues or worsens with increasing amounts of formula, go back to just electrolyte solution and repeat the process.