Dog Shaking Head Every Few Seconds
A dog shaking its head occasionally is a normal behaviour, it helps clear debris, moisture, or mild irritants from the ear canals. However, when a dog begins shaking its head every few seconds, repeatedly and persistently, it almost always indicates an underlying medical problem. This repetitive head shaking can quickly lead to secondary complications such as aural haematomas (blood blisters on the ear flap) and chronic inflammation. Recognising the causes and seeking timely veterinary attention are essential to relieving your dog's discomfort and preventing long-term damage.
Quick Q&A
Question: Why is my dog shaking his head every few seconds?
Answer: Persistent head shaking is usually a sign of irritation within the ear canal. Common causes include ear infections (otitis externa), ear mites, foreign bodies like grass awns, allergies, or trapped water. Rarely, it can be due to neurologic disorders such as head tremors or vestibular disease. A veterinary examination is necessary to identify the exact cause and provide appropriate treatment.
Understanding the Behaviour: Normal versus Pathological
Dogs use head shaking as a natural reflex to expel material from the external ear canal. A normal dog may shake its head a few times after swimming or being petted, but the behaviour should stop quickly. When the shaking becomes frequent, every few seconds or several times per minute, persisting for hours or days, it crosses from normal into pathological.
Pathological head shaking is driven by one of two mechanisms: a local irritation in the ear canal (most common) or a neurologic signal that creates involuntary movement of the head. The latter is less common but must be considered in cases where the ear appears clean and healthy.
Common Causes of Frequent Head Shaking
Otitis Externa and Otitis Media
Ear infections are the number one cause of persistent head shaking in dogs. Otitis externa (infection of the external ear canal) can be bacterial, fungal (yeast), or mixed. The infection creates inflammation, discharge, and intense pruritus (itching). Dogs will shake their heads in an attempt to relieve the sensation.
If otitis externa is left untreated, it can progress to otitis media (middle ear infection), which may cause pain, head tilt, and even neurologic signs such as Horner syndrome or facial nerve paralysis [1]. According to the Merck Veterinary Manual, the most common predisposing factors for otitis externa include conformation (pendulous ears such as in Cocker Spaniels), excessive moisture, and underlying allergic skin disease [1].
Parasitic Infestations
Otodectes cynotis (ear mites) are a frequent cause of head shaking in young dogs and in environments where multiple animals live together. These mites feed on ear wax and skin debris, causing intense irritation and a characteristic dark, granular discharge that resembles coffee grounds. VCA Animal Hospitals notes that ear mites are highly contagious between dogs and cats [2].
Less common parasites include Demodex mites (demodectic mange affecting the ear) and ticks that attach inside the ear pinna. In Australia and parts of Europe, paralysis ticks (Ixodes holocyclus in Australia) can cause both local irritation and systemic illness [3].
Foreign Bodies
Grass awns (foxtails, spear grass, barley awns) are particularly dangerous foreign bodies. These seeds have backward-facing barbs that allow them to migrate through the ear canal, causing severe pain, head shaking, and often secondary infection. The risk is highest in warm months and in regions where such grasses are prevalent, including the western United States, Australia, and Mediterranean Europe. A study published in the Journal of Small Animal Practice found that grass awns were the most common foreign body retrieved from canine ear canals in endemic areas [4].
Other foreign bodies include sand, gravel, or fragments of plants. Dogs that spend time outdoors or hunting are at increased risk.
Allergic Skin Disease
Atopic dermatitis and food allergies are major underlying triggers for recurrent ear infections and the associated head shaking. Allergies cause inflammation in the skin, including the ear canal lining, which predisposes the ear to microbial overgrowth. The AAHA Allergy Management Guidelines for Dogs emphasize that effective long term control of head shaking often requires management of the underlying allergy [5].
Allergic dogs typically show other signs such as paw licking, face rubbing, and recurrent skin infections. In these individuals, head shaking is a clue that the ears are involved in the allergic response.
Polyps, Tumours, and Masses
Inflammatory polyps, ceruminous gland adenomas, squamous cell carcinomas, and other neoplasms can obstruct the ear canal or cause chronic irritation. These masses are more common in middle-aged to older dogs. Head shaking may be the first owner-noticed sign, especially if the mass is deep within the vertical ear canal. Diagnosis requires otoscopic examination and often advanced imaging (CT scan) or biopsy. The CVMA provides guidance on management of aural neoplasms, noting that complete surgical excision may be necessary [6].
Neurologic Disorders
Less commonly, head shaking can stem from a neurologic problem rather than ear irritation. Conditions such as canine idiopathic head tremor syndrome (often seen in breeds like Doberman Pinschers, Bulldogs, and Boxers) produce rhythmic, repetitive head movements that may resemble shaking. These tremors typically occur while the dog is relaxed, and the dog remains conscious and responsive. They are generally considered benign but should be evaluated to exclude seizures or other brain disorders [7].
Vestibular disease, whether peripheral (inner ear) or central (brainstem), may cause head tilt, circling, and sometimes head shaking. However, the hallmark of vestibular disease is a sustained head tilt rather than rapid repetitive shaking.
Dental Disease
Apical abscesses or severe periodontal disease affecting the maxillary teeth (upper premolars and molars) can refer pain to the ear region. Dogs may shake their head or paw at the face in response to dental pain. A thorough oral examination and dental radiographs may be needed.
Diagnostic Approach
A methodical diagnostic workup is essential. The veterinarian will begin with a history, including the onset of head shaking, environment (recent hikes, swimming, contact with other animals), and any concurrent signs (odour, discharge, head tilt, scratching).
Otoscopic Examination
Visualising the ear canal and tympanic membrane is the critical first step. An otoscope allows the veterinarian to assess for redness, swelling, discharge, foreign bodies, masses, or a ruptured eardrum. In painful dogs, sedation may be required for a full examination.
Ear Cytology
A swab of ear discharge is stained and examined under a microscope to identify the organisms present. Cytology differentiates between bacterial cocci (e.g., Staphylococcus), bacterial rods (e.g., Pseudomonas), and yeast (Malassezia pachydermatis). This guides the choice of antimicrobial therapy. According to the AVMA, cytology is the most cost-effective tool for diagnosing infectious otitis [8].
Culture and Sensitivity
If cytology shows rod-shaped bacteria or if the infection is chronic and non-responsive, a bacterial culture and sensitivity test is recommended. This identifies the specific bacteria and the antibiotics to which they are susceptible. This is especially important given the rise of multi-drug resistant organisms in canine otitis [1].
Imaging
When otitis media is suspected (or if a foreign body or mass cannot be visualised with otoscopy), computed tomography (CT) or magnetic resonance imaging (MRI) may be indicated. Radiographs of the tympanic bullae can reveal evidence of fluid or bone destruction, but CT is more sensitive.
Allergy Testing
For dogs with recurrent ear infections and head shaking, intradermal skin testing or serum allergen-specific IgE testing can identify environmental or food allergens. The AAHA guidelines recommend a trial elimination diet for suspected food allergy [5].
Neurologic Examination
If ear examination is unremarkable, a full neurologic assessment may be performed to evaluate cranial nerve function, balance, and coordination. This helps differentiate peripheral from central vestibular disease and identifies tremor syndromes.
Treatment Strategies
Treatment must be directed at the underlying cause. Symptomatic relief alone often leads to recurrence.
Ear Cleaning and Flushing
Gentle, appropriate cleaning removes debris and discharge, allowing topical medications to contact the ear lining. Severe or chronic cases may require deep ear flushing under general anaesthesia. A veterinarian can recommend a veterinary-approved ear cleaner that matches the pH of the dog's ear and does not cause additional irritation. Owners should avoid cotton-tipped applicators, which can push material deeper.
Topical and Systemic Medications
- Bacterial infections: Topical antibiotics (e.g., gentamicin, marbofloxacin, or silver sulfadiazine) combined with a glucocorticoid to reduce inflammation. Systemic antibiotics are reserved for deep infections or when the tympanic membrane is ruptured.
- Yeast infections: Topical antifungal agents such as clotrimazole, miconazole, or nystatin.
- Ear mites: Topical preparations containing selamectin, moxidectin, or ivermectin. According to the FVE, all animals in the household should be treated to prevent reinfestation [9].
- Allergies: Addressing the underlying allergy is key. This may include allergen-specific immunotherapy (desensitisation shots), antihistamines, essential fatty acids, or immunomodulatory drugs (e.g., oclacitinib, lokivetmab). In Australia and Europe, cyclosporine is also used for atopic dermatitis.
Surgery
Surgical intervention is indicated for:
- Recurrent aural haematomas (with drain placement or suture techniques)
- Removal of masses or polyps (lateral wall resection or total ear canal ablation for malignant tumours)
- Severe, end-stage otitis where medical therapy has failed (total ear canal ablation and lateral bulla osteotomy)
The AVA notes that early referral to a veterinary surgeon is important when neoplasia or destructive middle ear disease is present [10].
Managing Neurologic Head Tremors
Benign idiopathic head tremors typically do not require treatment. However, if the tremors interfere with quality of life, some neurologists prescribe medications such as levetiracetam or phenobarbital. A definitive diagnosis from a veterinary neurologist is recommended.
When to Seek Immediate Veterinary Attention
While head shaking alone is not an emergency, certain signs warrant prompt veterinary care:
- Pain when touching the head or ear
- Severe swelling or discharge (blood or pus)
- Head tilt or circling
- Lethargy or fever
- Inability to open the mouth
- Recurrence despite treatment
Aural haematomas can develop within hours of intense head shaking. These require surgical or medical management to prevent disfigurement and fibrosis of the ear pinna.
Prognosis and Prevention
The prognosis depends on the underlying cause. Uncomplicated otitis externa typically resolves within 1 to 2 weeks with appropriate therapy. Allergic dogs may require lifelong management but can remain comfortable. Neoplasia carries a guarded to poor prognosis, especially if malignant.
Preventive measures include:
- Regular ear inspections, especially after swimming or outdoor activity
- Drying ears thoroughly after baths or swimming
- Using weekly ear cleaning solutions in predisposed breeds
- Controlling allergies through veterinary-guided protocols
- Routine parasite prevention (e.g., products effective against ear mites)
Regional Considerations
Veterinarians and pet owners should be aware of geographic variations in disease prevalence:
- United States and Canada: Grass awns (foxtails) are prevalent in the western plains and California. Ear mites are common in shelters and multi-pet households. The AVMA advises use of year-round parasite prevention.
- Australia: Grass seeds (e.g., Hordeum species) are a major cause of foreign body otitis. Paralysis ticks in coastal regions of Queensland and New South Wales can attach inside the ear. The AVA recommends careful tick searching after bush walks.
- Europe: Otodectes mites are common in cooler, northern climates. Wild boar awns and hedgehog spines have also been reported as foreign bodies. The FVE promotes responsible use of antibiotics in otitis to combat antimicrobial resistance.
- United Kingdom: Ears should be checked after walks in fields and woodlands. The British Small Animal Veterinary Association (BSAVA) provides specific guidelines on managing ear disease in primary care practice.
References
- Merck Veterinary Manual. Otitis Externa in Dogs. Available at: https://www.merckvetmanual.com. Accessed 2025.
- VCA Animal Hospitals. Ear Mites in Dogs. Available at: https://vcahospitals.com. Accessed 2025.
- Australian Veterinary Association (AVA). Tick Paralysis in Dogs. In: AVA Guidelines for Veterinary Practice. 2023.
- O'Neill DG, et al. Grass awn migration in dogs: a retrospective study of 143 cases. J Small Anim Pract. 2016;57(11):616-622.
- AAHA. AAHA Canine Allergy Management Guidelines. 2023. Available at: https://www.aaha.org.
- CVMA. Management of Aural Neoplasms. Canadian Veterinary Journal. 2020;61(4):419-424.
- Platt S, Olby N. BSAVA Manual of Canine and Feline Neurology. 4th ed. British Small Animal Veterinary Association; 2013.
- AVMA. Ear Cytology for Diagnosis of Otitis in Small Animals. AVMA Guidelines. 2022.
- Federation of Veterinarians of Europe (FVE). Parasite Control in Companion Animals. 2021. Available at: https://www.fve.org.
- Australian Veterinary Association. Total Ear Canal Ablation and Lateral Bulla Osteotomy: Surgical Guidelines. 2022.