Your dog scratches, and is more restless. Will it have fleas? Learn to detect these parasites that can cause some important problems in your pet.

Your dog scratches, and is more restless. Will it have fleas? Learn to detect these parasites that can cause some important problems in your pet.

Ctenocephalides felis Y Ctenocephalides canis they are the scientific names of cat and dog fleas respectively, although it is the flea of ​​the cat that has best adapted and is the most abundant, also in dogs.

Fleas have a great capacity to transmit from one animal to another and reproduce quickly. In this article you can see its biological cycle and some of its most important characteristics that explain its great capacity to spread.

Fleas can be more dangerous than we think

One of the most serious and frequent consequences of flea infestation is allergic dermatitis to flea bites or DAPP. It is an allergic reaction to some of the proteins present in flea saliva.

Not always when there is a flea infestation this disease occurs, although this dermatitis is surely the most frequent skin condition in dogs (and also in cats) in warm or temperate areas such as the Mediterranean countries.

This disease usually affects animals between the year and three years of age and is rarely found in puppies under six months. Once the allergic state has been established, a weekly flea bite is enough to maintain the disease. Some races are more predisposed than others (such as the Alsatian shepherd or the Flanders' buoy).

It is easy to distinguish this condition because a dermatitis appears with a great itching sensation. Scabs, nodules and scales are formed on the skin, especially in the lower back and in the hind limbs. The abdomen where lesions appear is also affected. It is common to observe hair loss in the armpits and English and in the neck. The visit to the veterinarian is convenient as soon as the first symptoms appear as the lesions can get worse and become infected (leading to seborrhoea and pyoderma).

Obviously, the first thing to do is avoid flea bites so that the ailment is not perpetuated.

You see that there are very important reasons to fight fleas before regretting the consequences of an infestation. Do not wait to discover the signs of the presence of fleas to apply a treatment that acts effectively as a preventive.

When you detect the presence of adult fleas in your pet it means that a large number of immature fleas are already developing in the environment. So choose a product that acts on both pets and the home, capable of eliminating immature forms hidden in carpets, beds and under furniture. These products contain an IGR, a growth inhibitor that prevents larvae from becoming adults. This will eliminate the source of future infestations.


The so-called dog flea (Ctenocephalides canis) is the one on the left and the cat's (Ctenocephalides felis) the one on the right, very similar although it has been that of the cat that has extended the most.

An infested dog becomes a living "salt shaker" of flea eggs, distributing them wherever it passes. The eggs will hatch and give rise to larvae, pupae and adults who will wait until a new host is within reach.

2. Skin red and irritated by allergic dermatitis:

Some dogs tolerate flea bites worse than others because they are allergic to them. The flea bite causes them Allergic dermatitis, that is, the skin of these dogs is irritated more than normal and their body reacts stronger. These dogs suffer a flea hypersensitivity. For these especially sensitive dogs, fleas cause other signs, besides itching and scratching.

The flea dermatitis it shows that the dog's skin is redness, reddish rashes and the dog can even lose hair in the areas of his skin most affected by the bites.

As the dog suffers a terrible itch from fleas, it scratches, scratching creates wounds and eczema on the skin and it stings more and scratches more ... and so is the story of never ending. That is why you have to detect fleas as soon as possible and remedy it.


Very complete article, I had no knowledge of the consequences that fleas originate in the health and well-being of dogs and of those who love such precious companions. During reading I confirmed the symptoms I had observed in my dog ​​a week before and attributed them to the change in the food brand. On the other hand, it gives very useful homemade alternatives and advice on preventing infection, all this without underestimating the medical attention of specialists.

Methods to protect the dog from fleas

Flea collar

One option to avoid fleas is to use a flea collar. It is very easy to put on and it is not a big problem. The only drawback may be that in areas of the Cantabrian cornice, it can be very difficult to control fleas or almost impossible, since the ideal climate for the flea is of average temperatures.


Flea pests are usually very abundant in these areas of Spain, especially in late summer and in the first months of summer. In these cases, many veterinarians recommend pipettes as an important support for flea control. These pipettes come perfectly dosed for each size of dog. As a general rule, all pipettes must be applied in areas where dogs cannot lick or touch each other.

Oral products

There are also other products to be administered orally. Some are adulticides: they kill fleas that are on top of the animal. Others, on the other hand, help fleas not reproduce.

If in spite of protecting your dog with deworming notes it scratches a lot, go to the veterinarian.

Flea life cycle

Fleas are parasitic insects observable to the naked eye. They have a flattened body to move better between the fur and are characterized by high-altitude jumps. The adults get on the dog and itch to draw your blood, from which they feed. The female lays eggs in the environment, between carpets or slits. These develop in several phases until they become adults and get on another animal, restarting the cycle. From their way of life we ​​extract important data such as the following:

  • Some animals react to the saliva of the parasite and this is how flea bite allergy is triggered in dogs.
  • Eggs require a specific range of temperature and humidity that occurs inside our homes throughout the year.
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Allergic reaction to fleas in dogs

An allergy is a reaction of the organism to elements that, in principle, should not be considered harmful such as pollen, dust or food. Thus, some dogs react to flea saliva, triggering an easily appreciable clinical picture that is known as DAPP or flea bite allergic dermatitis. Not all dogs will develop it but we must be aware that, for an allergic dog, a single sting is enough to cause symptoms.

Before pictures compatible with the presence of fleas deworming is appropriate. In dogs confirmed as allergic we must be strict with the deworming calendar. In the next section we explain the symptoms of flea bite allergy in dogs to be able to identify and treat them as soon as possible.

Symptoms of DAPP in dogs

Flea bite allergy in dogs manifests itself with the following symptoms:

  • Itching in greater or lesser intensity.
  • Granites bulky reds.
  • Due to scratching the hair falls and wounds are made, ranging from scratches to deep lesions that can become infected.
  • Lesions are characteristic of the lumbosacral area, abdomen and English, although, if left untreated, the damage extends.
  • Over time, the skin thickens And it gets dark

To avoid complications we must go to the veterinarian to treat and confirm the diagnosis, since it is possible that it is another dermatological disease.

Treatment of flea allergy in dogs

Once this allergy is identified, we can administer products that eliminate all the fleas that are on the dog in a matter of hours but, if there are symptoms such as wounds, infections or intense itching we are likely to have to treat them, because they do not disappear with the eradication of The parasites In addition, these antiparasitic products They do not usually protect more than about 24 hours, so we will have to supplement with others, choosing the most appropriate depending on the characteristics of our dog.

Must treat all animals of the house It is important to know that it is no use eliminating the fleas of the dog if we do not finish with those found in the environment. Thus, environmental control is essential to avoid flea bite allergy in our dogs.

How to eliminate house fleas?

Most of the flea population is going to find themselves in the ideal environment that constitutes our home for them. Thus, to prevent flea bite allergy in dogs, in addition to deworming the animal, it is essential that we maintain hygiene at home. We highlight the following recommendations to eliminate house fleas:

  • Aspirebetter than sweep, because in this way we absorb eggs and larval phases of soil and carpets. Let's not forget to vacuum the dog's bed too.
  • Wash blankets frequently and other clothes in contact with the dog.
  • Steam clean carpets and carpets.
  • In times of higher incidence of fleas it may be necessary to use some insecticide, sprayer, making sure that it penetrates carpets and carpets, or applied in the water to scrub, taking into account also the areas under furniture.

To vacuum more effectively and eliminate fleas from your home we recommend the use of a robot vacuum cleaner. The vacuum robots have the clear advantage of cleaning the floor of the home without having to waste time. Likewise, they offer excellent results thanks to their work programs and features, but which robot vacuum cleaner to choose? The ILIFE robot vacuum cleaners They stand out for their power of aspiration, for having the ability to vacuum carpets, for having two side brushes in addition to the central brush and for sucking all types of hair, parasites such as fleas and their eggs.

This article is purely informative, at we have no power to prescribe veterinary treatments or make any kind of diagnosis. We invite you to take your pet to the veterinarian in case he presents any type of condition or discomfort.

If you want to read more articles similar to Flea bite allergy in dogs - Symptoms and treatment, we recommend that you enter our section of parasitic diseases.