My dog ​​keeps scratching and biting. It may be a skin disease.

Aug 03,2026
3Min

Dogs scratch or have itchy skin

Causes of itchy skin:
1. Parasitic infection. Flea worms, scabies, hair follicle worms and lice.
2. Allergy. Parasitic secretions, contact dermatitis, food and medications.
3. Bacterial or fungal infection. Bacterial allergies and microsporal mold infections.
4. Others. Seborrhoea, skin calcification, tumors, immune diseases.
To reduce itching in dogs, it is quite common to use steroids in moderation. As long as steroids are not taken orally for a long time, the possibility of side effects is very small.

Dog scratching or bacterial dermatitis

Cause of disease:
Usually occurs when the dog’s skin is exposed to moisture for a long time and normal bacteria on the body surface The group is disturbed, the body's own circulatory system or immune system is abnormal, etc.
Clinical manifestations:
pustules, blisters, blood-like blisters and scales appear on the skin, and dark-colored patches appear on the body surface.
Treatment methods:
1. Severe systemic infection may require drip treatment or non-oral antibiotic treatment.
2. In the choice of hair shampoo, shampoo containing benzoyl peroxide.
3. Avoid feeding high-protein foods.
Prone dog breeds:Short-haired dogs and dogs with wrinkled skin.
Note: If the environment is dirty, proper cleaning is required. But to prevent over-cleaning, wash it once a week or twice as usual.

Dogs scratch or have fungal skin disease

Cause of disease:
Dampness, heat and humidity are the main causes. Dogs are more susceptible to infection if they are exposed to mold.
Clinical manifestations:
Commonly found on the surface of the skin, hair and toenails, ears, face, and limbs. There will also be round hair removal called military. Scabs, pustules, erythema, and pigmentation.
Treatment methods:
1. Oral medication. Griseofulvin, ketoconazole, itraconazole, terbinafine hydrochloride, etc.
2. External medication. Iodine lotion.
3. Clean environment. Dilute bleach 1:10 and clean the environment.
Notes:
Dogs may experience clinical itching if they are infected by fungus. If you apply steroid ointment or take it orally to relieve itching, it will suppress the body's immunity and cause lesions.diffusion.

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