Experienced and professional animal trainer provide their insights in answering this question :
A. It may be due to infection or something irritating around the eye. Also, these symptoms could be related to Demodecosis which is skin parasite infestation. I would suggest you to take your dog to your vets to find out 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 :

One of the more common causes of patchy dog hair loss and irritated red skin is demodicosis. This is especially common in puppies. Demodicosis (or “red mange”) is one of the skin problems in dogs that can be easily treated but requires a proper diagnosis.
Ringworm fungus, pests like mange mites, and bacteria can all lead to infections that may ultimately cause bald spots on your dog. Along with hair loss around the ears, eyes, mouth, and elsewhere, signs your dog may have mites include oily skin, thickened skin, itching, and inflammation.
An allergic reaction

If your dog is suffering from an allergy, his eyes might become swollen, red or itchy — just like your eyes when you`re around too much pollen, for instance. When your dog starts itching his eyes a lot, the contact dermabrasion can cause him to start losing hair around his eyes.

Symptoms of Hair Loss Related to Allergies in Dogs

Hair loss anywhere on the body (thinning of fur, bald patches) Constant scratching. Constant licking. `Brown` feet – also known as saliva stains from licking his feet constantly.

The itching is probably caused by sensitivity to the mites` droppings. Initially, infested skin will erupt with small, solid bumps. Because the dog scratches or bites itself to relieve the itch, these bumps and the surrounding skin are often damaged, causing thick, crusted sores.
Excessive shedding can be caused by stress, poor nutrition, pregnancy, lactation or another underlying medical condition. If you think your dog is shedding more than normal or if he is developing bald patches, schedule an appointment with your vet.
Copper deficiency causes a dull, dry haircoat with patchy hair loss and loss of normal hair pigment. The coat takes on a “washed out” appearance. Zinc deficiency causes hair loss, skin ulcers, and areas of skin thickening and cracking, particularly over joints and on foot pads.
Causes of Rash Around Dog Eye

Allergies: Dogs can develop allergies to various things, including food, pollen, and dust. Allergies can cause skin irritation and rashes around the eyes. Infections: Bacterial, fungal, and viral infections can cause rashes around the dog`s eye.

Symptoms of Dog Eye Allergies

In dogs, redness of the eyes is a vague symptom that can be caused by a wide variety of underlying diseases. For allergic conjunctivitis, the redness is usually seen in both eyes. You may also notice symptoms like: Squinting of the affected eye(s)

Environmental factors like temperature, nutrition, and stress can also affect canine coat loss. But while some loose hair occurs routinely during a dog`s hair growth cycles, thinning hair with mild to severe scratching and bald patches—also known as alopecia—is not.
Ingredients in dog food like beef, lamb, chicken, eggs, or soy could cause allergic reactions. One of the major symptoms of allergies is itchy skin, which leads to scratching and associated hair loss. If the problem gets bad enough, you`ll likely see redness and inflammation, bald spots, or oozing skin.
Vets will perform various tests to see if your dog has mange. They usually analyze skin scrapings under a microscope. This analysis allows them to see if your dog has mites and which kind: Demodex mites are cigar-shaped.
You may notice a very fine rash or just the itching at first. Over time the skin becomes very red, there is hair loss and flaking skin. Areas where hair is thinner (ears, elbows, ankles, belly) tend to be the most severely affected. However, some dogs may have a different pattern or no symptoms at all.
When your lab sheds in the spring, their bodies try to get rid of their thick and dense winter coat. That means that you should expect excess shedding anytime between March and May of each year. Later on, labs shed that same summer coat and begin to bulk up for the winter months when fall begins.
Worms can cause hair loss in dogs by interfering with the dog`s ability to process nutrients. Worms live inside the dog and can be transmitted from dog to dog through sniffing or licking each other`s anuses.
Can humans catch mange from dogs? Yes, but sarcoptic mange mites can only complete their life cycles on dogs and some other animals. This means that while human infections can still cause lots of irritation, they will be short-lived.
Mange is a skin condition caused by mites. It typically affects dogs, but some forms can also affect humans. The most common type of mange in dogs is sarcoptic mange, also called canine scabies. Humans can catch sarcoptic mange from dogs, but the mites involved cannot complete their life cycle in human skin.
Ringworm can show in a variety of ways in dogs, most commonly as patches of hair loss with a crusty coating, or (rarely) as asymptomatic. Ringworm patches in some dogs resemble a grey, scaly patch, while in others they resemble a scarlet lesion.
Seborrhea, or seborrheic dermatitis, is a skin disorder in which the sebaceous glands of the skin produce an excessive amount of sebum, causing scaly, flaky, itchy, and red skin. Seborrhea typically affects the back, face, and flanks and is worse in the folds of the skin.
Add an omega 3 supplement

Feed your pet a multivitamin with Omega 3 fatty acids, which may help restore your pet`s skin health and reduce hair loss.

“Early-stage sarcoptic mange usually starts out as an itch around the ear flaps and the elbows,” Taylor says. But mites also like living on a dog`s belly, armpits, and legs. Initially, a dog with sarcoptic mange scratches constantly, making the skin under the fur red and irritated.
Your veterinarian may recommend short-term symptomatic treatment for the inflammation, such as application of warm compresses for 5-15 minutes several times per day and removal of any discharge from the eye. However, any specific treatment for blepharitis will depend on the underlying cause of the disorder.
The fact is that if your dog is experiencing any eye sensitivity, irritation, or pain it`s time to head to your vet. Your veterinarian will be able to conduct a thorough eye exam to determine the cause of your pup`s symptoms and provide effective treatment to help your dog`s eyes feel better.
Otherwise, eczema becomes visible when a dog develops hot spots. These are patches of skin where their fur has fallen out, and the skin looks red, sore, and moist. These bald spots can sometimes have a gross smell, and a scab might form over the top of them.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. My Pug’s nose is red and he doesn’t have a yeast infection. He is taking medicine for that. It seems to get worse when he goes outside. Any ideas?
ANSWER : A. Redness or irritation can be caused by a number of things including yeast infections as you mentioned, but can also be caused by allergies to the environment, or even cold or hot weather. Dogs with short fur can often get sunburns on the skin, and the cold may also irritate or cause redness when outdoors. Allergies to pollens or other outdoor allergens may also cause redness on the body or nose. An allergy medication from your vet is usually all that is needed to clear this up.

If the redness is happening just when outside, it may also be that your dog is digging or nosing around in something that is irritating. It may be a good idea to watch your dog a few times while he is outside to see if there is anything he enjoys exploring. The redness could just be irritation from that.

However, if you are concerned about the redness, it is always a good idea to bring it up with your veterinarian to make sure there is not a more serious cause behind it.

Q. Ceasar (my Black Lab) has a loss of hair – rash like around his eys. Not red but noticabley irritation. Any idea what this is?
ANSWER : A. It may be due to infection or something irritating around the eye. Also, these symptoms could be related to Demodecosis which is skin parasite infestation. I would suggest you to take your dog to your vets to find out what is going on.

Q. Dachshund has symetrical hair loss since aged 6 mth now 1 treated for mange had testicle removed from abdo still no better what’s next best step ?
ANSWER : A. Has hormonal disease like hypothyroidism been ruled out? That is a hormonal disease that is common causes of symmetrical hair loss, and it can be genetic, so you would see it in a dog that’s very young like yours. I agree that treating for mange was also a good idea, since that can cause hair loss as well and sometimes we can’ actually find the mites on a skin scraping.

Was a biopsy performed on the testicle? Because intra-abdominal testicles frequently turn into Sertoli cell tumors, which also cause symmetrical hair loss. If a biopsy was performed you should know for sure whether that was the cause of the hair loss or not. If the testicle wasn’t cancerous and removing it did not resolve the hair loss then the next step is a skin biopsy, unfortunately. Sounds frustrating – good luck.

Q. Dog has pimple like sores with black lumps inside that won’t heal and hair loss on back he is a pitbull
ANSWER : A. Skin problems can have a variety of causes, sometimes more than one. It is important to have the problem checked by your vet to determine if there is a medical cause for your pet’s skin issues and treat accordingly.

In pets of all ages, fleas, food allergies and exposure to chemical irritants such as cleaners and soaps can be a cause. Any one of these may not be enough to trigger the breakouts, depending on how sensitive your pet is, but a combination can be enough to start the itch-scratch cycle. Finding out the cause and eliminating it is the best course of action. With flea allergies, if your pet is sensitive enough, a single bite can cause them to break out scratch enough to tear their skin.

Check for fleas with a flea comb. Look for fleas and/or tiny black granules, like coarse black pepper. This is flea feces, consisting of digested, dried blood. You may find tiny white particles, like salt, which are the flea eggs. Applying a good topical monthly flea treatment and aggressively treating your house and yard will help break the flea life cycle.

If you use plastic bowls, this is a possible cause for hair loss, though this tends to be on the chin, where their skin touches the bowl while they eat. If you suspect this to be the culprit, try changing the bowls to glass, metal or ceramic.

Food allergies are often caused by sensitivity to a protein in the food. Hill’s Science Diet offers some non-prescription options for sensitive skin as well as prescription hypoallergenic foods for more severe cases. Royal Canin carries limited protein diets that may also offer some relief. Your vet can recommend a specific diet that will help.

Q. My dog likes to walk around trees and bushes. I noticed today a rash on his back in a straight line and his hair is gone in the area. Help?
ANSWER : A. If you live in a brushy or wooded area it is possible that your dog may have come into contact with an irritant such as poison oak or poison ivy. These can spread to people, so care should be taken when handling the area by using gloves and washing hands. You should also prevent your dog from licking or scratching at the area to prevent the spread of irritation. Topical ointments for pets can be used to treat oak/ivy infections.

Other causes such as allergies, cuts and scrapes, or even external parasites can cause redness as well. Ticks and fleas are common in wooded and brushy areas, so making sure your pet is on a preventative for these is important.

If the rash appears to have any cuts, scrapes, open sores, hair loss or spreads, then making an appointment with your vet is best. Your vet can take a sample of the area to look for any more serious infections causing the redness.

Q. Russian blue mix cat – usually velvet soft coat but hair on back hind qtrs. is thinning, remaining hair seems less velvety than normal
ANSWER : A. Changes in coat appearance can be caused by a number of things. In older cats, hair loss or changes in coat and skin confirmation may indicate a metabolic issue such as thyroid problems. Cats can begin to lose hair and may also show other changes such as weight changes or appetite changes. Blood work is usually done to check for this, and most pets do very well with a daily medication treatment.

Hair loss can also be caused by mites on the skin, external parasites or even skin and fungal infections. These may cause red bumps or sores to appear on the skin in addition to the hair loss and coat changes. Your vet can take a skin scraping of the area to check for mites and infections, and a preventive flea treatment can remove any external parasites. If an infection or mites are present, your vet can also prescribe an antibiotic or topical cream to treat.

After any treatment it may take a month or two for completely bald patches to grow back in. This is normal as the skin and follicles need some time to heal prior to beginning the hair growth cycle again.

Q. Year 3 my dog loses patches of hair on back, stomach and neck. Vet has tested, but has not found anything. Patches are a red and scaly by hair lin
ANSWER : A. Skin problems can have a variety of causes, sometimes more than one. It is important to have the problem checked by your vet to determine if there is a medical cause for your pet’s skin issues and treat accordingly.

In pets of all ages, fleas, food allergies and exposure to chemical irritants such as cleaners and soaps can be a cause. Any one of these may not be enough to trigger the breakouts, depending on how sensitive your pet is, but a combination can be enough to start the itch-scratch cycle. Finding out the cause and eliminating it is the best course of action. With flea allergies, if your pet is sensitive enough, a single bite can cause them to break out scratch enough to tear their skin.

Check for fleas with a flea comb. Look for fleas and/or tiny black granules, like coarse black pepper. This is flea feces, consisting of digested, dried blood. You may find tiny white particles, like salt, which are the flea eggs. Applying a good topical monthly flea treatment and aggressively treating your house and yard will help break the flea life cycle.

If you use plastic bowls, this is a possible cause for hair loss, though this tends to be on the chin, where their skin touches the bowl while they eat. If you suspect this to be the culprit, try changing the bowls to glass, metal or ceramic.

Food allergies are often caused by sensitivity to a protein in the food. Hill’s Science Diet offers some non-prescription options for sensitive skin as well as prescription hypoallergenic foods for more severe cases. Royal Canin carries limited protein diets that may also offer some relief. Your vet can recommend a specific diet that will help.

If there is no relief or not enough, consider getting your pet checked by a veterinary dermatologist and having allergy testing done.

Q. Yellow lab F, approx 9-10 yrs. Sudden onset of extreme redness in one eye, now seems to have spread to other over 24-48 hrs. Healty, active, good app.
ANSWER : A. This could be a bacterial conjunctivitis. Dogs can pass these infections around, just like people can. The fact that it started in one eye and moved to the other suggests infection, but I can’t rule out something more serious like glaucoma. I feel like anytime a dog’s eye gets acutely red like this it’s cause for alarm, and needs to be checked out as soon as possible. Like I said above, it’s likely a simple eye infection, but get it checked out to be sure.

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