What is "swimmer's tail" in dogs, and how do you treat it?

2 October 2025 - 5 min read
This article is not intended to be a substitute for professional veterinary advice, diagnosis, or treatment. Always seek the advice of your veterinarian with any questions you may have regarding your pet’s care, treatment, or medical conditions.
Yellow lab swims in a pool with mouth open

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Ever notice your pup’s tail hanging low and looking limp after a day of fun at the lake or a vigorous game of fetch? Is the base of your dog's tail swollen?

It might be swimmer's tail, a condition also known as "limber tail," "cold tail," or "broken wag" (and myriad other names).

Let's dive into what swimmer's tail is, why it happens, and how to get that tail wagging again.

What's swimmer's tail?

A Labrador Retriever shakes off some water on their fur as they leave a lake

Swimmer's tail occurs when a dog's tail becomes limp and painful due to overuse, injury, or exposure to cold. Despite the name, swimming isn't the only potential cause of the condition. It can also be triggered after a cold bath, vigorous play, or even just enthusiastic wagging.

The limpness usually starts at the base and extends a few inches before drooping straight down.

Heads up: Even if you're 99% sure it's swimmer's tail, it's still a good idea to see a vet—your pup's limp tail could be due to a fracture or point to a more serious condition.

Symptoms of swimmer's tail

A picture of a Golden Retriever running on the beach as the ocean's tide hits their legs

If your dog has swimmer's tail, you might notice a few tell-tail signs:

  • Appetite changes: Sometimes, dogs might eat less because of the pain.

  • Behaviour changes: Your pup may become lethargic and reluctant to play or exercise. They might hold their tail in an odd position or have trouble sitting comfortably.

  • Distress: Some dogs might whimper or whine, especially when they try to move their tail.

  • Limp tail: The tail hangs down and looks limp, especially if your dog usually has a perky, wagging tail.

  • Pain: Your dog might flinch, whine, or avoid having their tail touched.

  • Swelling: A dog tail swelling at the base. Canine swimmers tail are often tender too.

Spotting these signs early can help you manage swimmer's tail before it gets worse!

Common causes of swimmer's tail

Dog sitting in a freshwater pool surrounded by green trees

Swimmer's tail can sneak up on your dog for a few reasons. Let’s break down the usual culprits:

Overexertion

Dogs that are super active have a higher chance of developing swimmer's tail. Long swims, intense play, or even too much wagging can overwork the muscles in the tail, leading to inflammation and pain. This overexertion causes a muscle strain, resulting in a limp, painful tail.

Cold exposure

Exposure to cold water or cold, wet weather can also contribute to swimmer's tail. When dogs jump into cold water or spend time in chilly conditions, the sudden temperature change and constriction of the blood vessels in this area can lead to muscle sprains. One study suggests that dogs exposed to these conditions were more prone to limp tails, but the exact cause is still being researched.

Confinement

Dogs who are confined in crates that are too small for them to move their tails properly (or are just in there too long) can develop swimmer's tail due to restricted movement and muscle strain.

Dog breeds prone to swimmer's tail

Any breed can develop swimmer's tail, but one study found that larger working breeds are more at risk. This makes sense, as these working breeds are more likely to engage in high-intensity activities and, in the case of wet and windy Britain, spend a lot of time around the water.

Canines prone to swimmer's tail include:

Notice a trend? These breeds love to swim and engage in intense physical activities, which puts them at higher risk for developing swimmer's tail.

Additionally, some research indicates that swimmer's tail might be related to genetics, but it's not conclusive.

Diagnosing swimmer's tail

A puppy looks up inquisitively at a woman vet sat next to them

Think your pup might have swimmer's tail? Time to visit the vet! Here’s a good idea of what to expect during the vet visit—from the first exam to possible treatment costs.

Physical exam

Your vet will start with a thorough physical exam. They'll check your dog's tail for signs of pain, swelling, and limpness. The vet may gently manipulate the tail to assess the range of motion and pinpoint areas of discomfort.

X-rays

To rule out fractures or other serious conditions, the vet might use X-rays. While swimmer's tail is a muscle strain, fractures and dislocations can present similar symptoms, so it's crucial to differentiate between them. On that note...

Potential misdiagnoses

Other conditions can mimic the symptoms of swimmer's tail, so it's important to consider these:

  • Fractures: Broken tail bones can cause similar limpness and pain.

  • Dislocations: A dislocated tail can also present with similar symptoms but usually involves more acute pain and visible deformity.

  • Infections: Infections in the tail area can cause swelling and pain.

  • Neurological Issues: Nerve damage or neurological disorders can affect tail movement and cause limpness.

Additional tests

If the diagnosis is still unclear, your vet might perform additional tests such as:

  • MRI or CT Scan: In rare cases, advanced imaging might be needed to get a detailed view of the tail muscles and bones.

  • Blood Tests: These can help rule out infections or other underlying conditions that could cause similar symptoms.

  • Urinalysis: Sometimes used to check for infections that might cause discomfort and impact your dog's tail behaviour.

Treatment costs for swimmer's tail

To be frank, treatment costs can vary a lot. Prices typically depend on the severity of the condition, the diagnostic tests required, and even your location.

Of course, your vet will provide a detailed cost estimate based on your dog's specific needs, and you'll have the ability to say yes or no to treatment plans or tests.

By the way, this is where dog insurance can really shine! It's designed to help reimburse you for unexpected accidents and illnesses that crop up in your pup's life.

How's swimmer's tail treated (and what can you do at home)?

A blonde-brown dog swimming in the ocean

Treating swimmer's tail usually involves a few simple steps, with rest being #1. Of course, only proceed with treatments once you've spoken to your vet, so you can rule out other more serious conditions (like intervertebral disc disease).

  • Rest: Let your dog rest and avoid activities that could strain their tail. Rest is key to healing those inflamed muscles.

  • Pain management: Your vet might suggest pain relief medications to help your dog feel better. Nonsteroidal anti-inflammatory drugs (NSAIDs) are usually on the front line to reduce inflammation and pain.

  • Warm compresses: Apply a warm compress to the base of the tail to reduce inflammation and soothe sore muscles.

  • Hydration and nutrition: Make sure your dog stays hydrated and eats well to support their recovery. Good nutrition helps with muscle repair and overall health.

Watch your dog for any signs of discomfort or changes in behaviour, and reach out to your vet if other symptoms emerge. With proper care, the condition typically resolves within a few days to a couple of weeks.

How to prevent swimmer's tail for chronic cases

A woman walks with her Labrador through a park, it's autumn and the trees are changing colour

While you can't completely prevent swimmer's tail, there are a few key ways to decrease your dog's chances of developing that tell-"tail" limpness:

Gradually build up exercise

Ramp up your dog's activity level slowly instead of jumping into intense exercise. This helps their muscles adapt and strengthen over time, reducing the risk of overexertion. For example, if your dog loves swimming, start with shorter sessions and gradually increase the duration. Warming up and cooling down before and after exercise can also help keep their muscles in good shape.

Keep them warm

Avoid sudden exposure to cold water or weather—and that includes baths. The goal is to gradually acclimate your dog to cooler conditions to prevent muscle shock. If your dog loves swimming in cooler waters, let them adjust to the temperature before diving in.

Take regular breaks during activities

Give your dog plenty of breaks during long periods of activity. Short rest periods can prevent muscle overuse and reduce the risk of swimmer's tail. This is especially important for working dogs or during long play sessions.

Make sure they have access to plenty of drinking water and a comfortable place to rest. Keep an eye on their activity levels and adjust their exercise routine if you notice signs of fatigue or discomfort.

Use the proper crate size

Make sure your dog's crate is large enough for them to move around comfortably. Restricted movement in a cramped crate can contribute to muscle strain and tail issues. Giving them enough space to stretch out can help prevent conditions like swimmer's tail.

Remember, whenever you're worried about your dog’s health, don’t hesitate to consult your vet. They can provide personalised advice and treatment plans.

When is swimmer's tail an emergency?

Signs your dog needs to see a vet immediately include:

  • Inability to pee or poop

  • Signs of severe pain, like constant yelping

  • Symptoms aren't improving

  • The tail has an open wound or is crooked

FAQs

Is swimmer's tail the same as a broken tail?

No. They're different conditions. While symptoms are similar, broken tail more often refers to a tail fracture.

How long does a dog's tail take to heal from swimmer's tail?

It can take anywhere from a few days to two weeks. It depends on your vet's diagnosis, so always follow their advice.

Can a dog get swimmer's tail from cold water?

Yes. Cold water is a higher risk for dogs to develop swimmer's tail, especially if a dog swims in it. Cold water reduces blood flow to the area which increases the risk of the condition developing.

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Leanna Zeibak
Content Manager

Leanna Zeibak is a Content Manager at ManyPets. In her spare time, she paints pet portraits and bakes far too many chocolate chip cookies.