Dog Hair Loss and Shaking
Hair loss accompanied by shaking or trembling in a dog can be an unsettling combination for owners, as shaking may indicate pain, neurological involvement, or systemic illness, while hair loss points to skin, hormonal, or metabolic disruption.
Quick Answer
Hair loss combined with shaking in dogs can be associated with several conditions including pain (from skin infections, arthritis, or injury), hypoglycemia, hypothyroidism, neurological disorders, toxin exposure, or severe anxiety. Because shaking can signal pain or a neurological event, a veterinary evaluation is recommended when both signs occur together.
SYMPTOM TRIAGE
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What Can This Symptom Look Like?
The combination of hair loss and shaking can present in various ways, and the characteristics of each sign can help differentiate the possible causes.
Shaking or trembling may appear as:
- Generalized tremors — The whole body shakes or trembles, which may be visible when the dog is standing or lying down
- Localized shaking — Trembling confined to one leg, the head, or a specific part of the body, which can suggest a focal neurological issue or localized pain
- Episodic shaking — The dog shakes intermittently, with periods of normalcy between episodes
- Persistent trembling — Continuous or near-continuous shaking that does not resolve with rest or warmth
- Panting combined with shaking — The dog pants and trembles simultaneously, which can suggest pain, anxiety, or metabolic disturbance
Hair loss may appear as:
- Focal patches — Well-defined bald areas that may or may not be red, inflamed, or itchy
- Thinning coat — Generalized reduction in hair density, often most noticeable on the trunk or flanks
- Abrasion-related loss — Hair loss from persistent licking or scratching of a painful area
- Non-inflammatory alopecia — Bald patches with skin that otherwise appears normal, typical of endocrine conditions
When shaking is caused by pain, you may notice the dog also avoids being touched in certain areas, holds a limb differently, or shows other signs of discomfort such as whimpering, restlessness, or an altered gait.
What May Be Associated with This Symptom?
Pain-Related Causes
Skin infections and inflammation can be intensely itchy or painful, causing a dog to shake (particularly the head or affected area) and scratch or lick excessively. Bacterial pyoderma, deep skin infections, or hot spots can develop bald patches as the dog traumatizes the area through scratching. The shaking may be a response to discomfort or may be head-shaking related to ear infections that extend to the skin of the face and pinnae.
Musculoskeletal pain — Conditions such as arthritis, intervertebral disc disease, or soft tissue injury can cause a dog to tremble or shake, especially when standing or trying to move. While these conditions do not directly cause hair loss, the dog may develop localized hair loss over painful joints from persistent licking (acral lick dermatitis) or from reduced mobility leading to pressure sores.
Metabolic and Endocrine Causes
Hypoglycemia (low blood sugar) can cause trembling, weakness, and in severe cases seizures. While hypoglycemia does not directly cause hair loss, it may be associated with conditions that do — such as insulin overdose in diabetic dogs or liver disease (which can cause both hypoglycemia and poor coat quality). Hypoglycemia is a veterinary emergency.
Hypothyroidism can cause muscle weakness and tremors in some dogs, alongside the more typical hair loss, weight gain, and lethargy. The trembling is usually mild and may be most noticeable in the hind limbs.
Hypocalcemia (low blood calcium) can cause tremors, muscle twitching, and stiffness. This is most commonly seen in dogs with eclampsia (milk fever) after whelping, but can also occur with certain types of kidney disease or parathyroid disorders. Hair loss is not a direct feature but may be present if the underlying condition also affects the coat.
Neurological Causes
Seizure disorders can manifest as shaking or trembling that may be focal (affecting one part of the body) or generalized (affecting the whole body). If the seizures are caused by a brain tumor, the metabolic effects of the disease may also contribute to poor coat condition. Post-seizure confusion and anxiety can also lead to stress-related shedding.
Neuromuscular disorders — Conditions that affect the nerves controlling the muscles, such as myasthenia gravis or certain polyneuropathies, can cause weakness and trembling. While not directly causing hair loss, the overall decline in health can affect coat quality.
Toxin Exposure
Toxin ingestion is a potential cause of both signs. Certain toxins — including some plants, chemicals, medications (such as excessive flea and tick preventives in certain formulations), or human foods — can cause tremors and shaking. If the toxin also causes dermatological irritation, hair loss may develop as a secondary sign. Toxic exposure is a veterinary emergency.
Psychological Causes
Anxiety and fear are common causes of shaking in dogs. Separation anxiety, noise phobias (thunderstorms, fireworks), or generalized anxiety can cause trembling, panting, and behavioral changes. Chronic stress can also lead to hair loss through telogen effluvium. However, medical causes should always be ruled out before attributing these signs to anxiety.
Cold Temperature
Simple exposure to cold can cause a dog to shake as a thermoregulatory response. If a dog has a poor coat (due to hair loss from any cause), they may be more susceptible to cold and therefore shake more readily. In this case, the shaking is secondary to the hair loss rather than being caused by the same underlying condition. Ensuring the dog is warm and comfortable can help differentiate this from other causes.
What Should the Pet Owner Monitor?
- Type and pattern of shaking — Is the shaking generalized or localized? Does it occur at rest, during movement, or both? How long do episodes last?
- Context of shaking — Does the shaking happen in specific situations (during thunderstorms, when left alone, after eating) or does it seem constant?
- Hair loss details — Where is the hair loss located? Is the skin underneath inflamed, itchy, or normal? Is your dog scratching or licking the areas?
- Signs of pain — Is your dog whimpering, guarding a body part, limping, or reacting when touched in certain areas?
- Appetite and water intake — Has your dog's eating and drinking changed?
- Behavioral changes — Note any confusion, disorientation, pacing, hiding, or changes in social interaction.
- Potential toxin exposure — Consider whether your dog may have had access to toxic substances, chemicals, medications, or unusual plants.
Recording a video of the shaking can be extremely valuable for your veterinarian to observe the character and pattern of the tremors.
What Can the Owner Safely Do Next?
- Keep your dog warm and comfortable. If the shaking appears related to cold or stress, providing a warm, quiet, comfortable space may help.
- Observe without intervening excessively. Try to capture the shaking on video and note the circumstances, but avoid restraining or stressing the dog further.
- Check for obvious skin problems. Gently examine areas of hair loss for redness, warmth, discharge, or signs of infection.
- Ensure a safe environment. Remove access to any potential toxins, and keep the area free of hazards in case the shaking is related to a neurological episode.
- Schedule a veterinary appointment. Because shaking can indicate pain or neurological disease, professional evaluation is recommended rather than prolonged home observation.
When to Contact a Veterinarian
Seek emergency veterinary care immediately if:
- The shaking is severe, constant, or accompanied by collapse, loss of consciousness, or seizure-like activity
- Your dog is unable to walk or stand
- You suspect toxin exposure
- Your dog shows signs of extreme pain — crying out, unable to settle, panting excessively with pale gums
- The shaking started suddenly and is getting worse
Schedule a veterinary appointment soon (within 24-48 hours) if:
- The shaking is intermittent but recurring and hair loss is present
- Your dog is shaking and seems painful but is still mobile and alert
- Hair loss is progressing, and the skin appears inflamed or infected
- The shaking is mild but persistent over hours or days
FAQ
Why is my dog shaking and losing hair at the same time?
This combination may indicate pain (from skin infections, arthritis, or injury), a metabolic disturbance (such as hypoglycemia or hypothyroidism), a neurological issue, toxin exposure, or anxiety. A veterinary examination is needed to determine the underlying cause and appropriate treatment.
Can ear infections cause both shaking and hair loss?
Yes. Ear infections can cause head-shaking, and if the infection or the scratching that follows leads to skin trauma on the ear flap (pinna) or surrounding areas, localized hair loss can develop. Your veterinarian can examine the ears and prescribe appropriate treatment.
Can anxiety cause my dog to shake and lose hair?
Chronic anxiety can cause trembling and may contribute to stress-related hair shedding (telogen effluvium). However, because shaking and hair loss can also be caused by serious medical conditions, a thorough veterinary evaluation is important before assuming an emotional cause.
Should I try to comfort my dog when they are shaking?
Yes, gentle reassurance in a calm, warm environment is appropriate. Avoid restraint or forcing the dog to be still, as this may increase anxiety. If the shaking appears to be a seizure, keep your hands away from the mouth and protect the dog from injuring itself on nearby objects.
SYMPTOM TRIAGE
Shaking combined with hair loss can have many causes ranging from anxiety to serious medical conditions. Use our symptom triage tool to help evaluate how urgently your dog may need veterinary attention.
This tool does not diagnose conditions or replace a veterinarian.
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Disclaimer: "This article and the PawAI Symptom Triage tool provide general information and cannot diagnose conditions or replace examination, diagnosis, or treatment by a licensed veterinarian. If you are concerned about your pet's health, contact a veterinarian promptly."