Bleeding Lumps in Dogs: What to Do When a Lump Starts Bleeding
Finding a lump on your dog can be worrying enough. Finding one that has suddenly started bleeding can be particularly alarming — especially when it seems to bleed easily, keeps reopening, or is difficult to get under control.
Bleeding skin lumps can occur for a number of reasons. Some are relatively benign growths that have been knocked, scratched or irritated, while others may be vascular growths containing a large number of blood vessels.
Whatever the cause, a lump that is bleeding, changing, ulcerated or repeatedly reopening should be assessed by your veterinarian.
But what can you do in the meantime — particularly if you have a dog with a known bleeding tumour or a lump that your veterinarian is already monitoring?
Why do some lumps bleed so easily?
Some skin growths have a particularly rich blood supply. This includes vascular growths such as hemangiomas and hemangiosarcomas, which arise from cells associated with blood vessels.
Because of their vascular nature, these lumps can sometimes bleed following surprisingly minor trauma. Your dog may scratch the area, rub against something, lick it, or simply knock the lump while going about their day.
Other lumps may become ulcerated as they grow, leaving a fragile surface that repeatedly breaks open.
The important thing to remember is that you cannot reliably determine what a lump is simply by looking at it.
A bleeding lump isn't automatically cancer — but it isn't something we recommend ignoring either.
First: try to control the bleeding
If a superficial lump begins bleeding, stay calm and try to prevent your dog from licking or disturbing the area.
Using clean gauze or a clean cloth, apply firm, continuous pressure directly over the bleeding area for several minutes.
Try not to repeatedly lift the gauze to check whether it has stopped. Disturbing the area can disrupt the developing clot and cause bleeding to begin again.
If the bleeding is significant, will not stop, or your dog appears unwell, veterinary attention is needed.
Yunnan Baiyao: traditional support for bleeding
Yunnan Baiyao is a traditional Chinese herbal formula with a long history of use as a haemostatic — something used to support the body's ability to control bleeding.
It is also used by some integrative veterinarians as supportive care for dogs experiencing bleeding associated with conditions such as hemangiosarcoma and other bleeding masses.
Veterinary research into Yunnan Baiyao is still limited and results are mixed. Some research in healthy dogs has found changes consistent with increased clot strength, while another small study did not find clinically significant changes in the coagulation measurements assessed. It has also been investigated in dogs with hemangiosarcoma. Importantly, Yunnan Baiyao should not be considered a treatment for cancer or a replacement for appropriate veterinary care.
Yunnan Baiyao Capsules – Bleeding Support
We now stock Yunnan Baiyao Capsules 16pk (Bleeding Support) for pet guardians who have been advised to keep Yunnan Baiyao available as part of their dog's supportive care plan.
Each packet also contains the traditional emergency red pill in the centre of the packet. This is intended for emergency bleeding situations rather than routine use.
If your dog has a diagnosed tumour or medical condition, we recommend discussing Yunnan Baiyao with your veterinarian or integrative veterinarian so it can be incorporated appropriately into their individual treatment or palliative-care plan.
Can Yunnan Baiyao be put directly onto a bleeding lump?
Some integrative veterinarians also use Yunnan Baiyao topically for superficial bleeding tumours or cutaneous hemangiomas.
There are currently no standardised veterinary studies establishing an exact topical preparation or protocol, so this use is based on integrative veterinary practice rather than a proven veterinary treatment protocol.
Two approaches are commonly used.
Option 1: Apply the dry powder
For an actively bleeding superficial area:
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Wash your hands.
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Open one Yunnan Baiyao capsule.
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Sprinkle the powder directly over the bleeding surface.
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Place clean gauze over the area and apply gentle, continuous pressure for several minutes.
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If practical, protect the area with a non-stick dressing and light bandage.
This is one of the simplest ways the powder is used topically.
Option 2: Make a Yunnan Baiyao paste
For a superficial lump that repeatedly oozes or bleeds, the powder can also be mixed into a paste:
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Wash your hands.
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Open one capsule of Yunnan Baiyao.
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Empty the powder into a sterile, clean container.
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Add just enough sterile saline to create a thick paste. If saline isn't available, cooled previously boiled water can be used.
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Usually only around 2–5 drops of liquid are required. You're aiming for a toothpaste-like consistency that will stay on the lesion.
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If necessary, gently clean the surface of the lump with sterile saline.
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Apply a thin layer of the paste over the bleeding surface.
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If practical, cover it with a non-stick dressing and light bandage. If bandaging isn't possible, allow the paste to dry.
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The paste may be reapplied once or twice daily, after cleaning the area, or if it comes off.
Try to prevent your dog from licking the area until the paste has dried or the area has been covered. If a small amount is licked, the product is intended for oral use; however, repeated licking can remove the paste and irritate the lesion further.
What Yunnan Baiyao does NOT do
This is particularly important.
Applying Yunnan Baiyao to a bleeding tumour does not treat or remove the tumour itself.
The purpose of topical use is to help manage surface bleeding and support clot formation.
A bleeding lump still needs an appropriate veterinary diagnosis and management plan.
Do not apply the paste to:
• deep puncture wounds
• wounds showing obvious signs of infection or pus
• deep body cavities
• surgical wounds unless specifically instructed by your veterinarian.
When is a bleeding lump an emergency?
A small amount of surface bleeding from a known skin lump is very different from significant blood loss or internal bleeding.
Seek urgent veterinary attention if:
• bleeding is heavy or cannot be controlled with pressure
• the area repeatedly saturates dressings
• your dog's gums become pale or white
• your dog suddenly becomes weak or unusually lethargic
• your dog collapses
• their abdomen suddenly appears enlarged or distended
• they are breathing rapidly or having difficulty breathing
• you suspect internal bleeding.
If your dog has been prescribed or recommended Yunnan Baiyao and significant bleeding occurs, the emergency red pill located in the centre of the packet is traditionally used orally for an acute bleeding episode while emergency veterinary attention is sought.
Do not delay emergency veterinary care while waiting to see whether Yunnan Baiyao stops the bleeding.
Don't assume an old lump is harmless because it has "always been there"
It's easy to become accustomed to the lumps and bumps our dogs develop as they age.
But a lump deserves another look if it:
• suddenly becomes larger
• changes colour or appearance
• becomes ulcerated
• starts bleeding
• repeatedly forms a scab and then bleeds again
• becomes painful or irritating
• begins bothering your dog.
Even if your veterinarian has previously examined the lump, a change in its behaviour is a good reason to have it reassessed.
Supporting dogs with known bleeding tumours
For some dogs — particularly seniors or dogs receiving palliative care — removing a tumour may not be appropriate or possible.
In these situations, having a plan for managing episodes of superficial bleeding can make an enormous difference for both the dog and their guardian.
Talk to your veterinarian about what you should keep at home. Depending on your dog's individual circumstances, this might include non-stick dressings, sterile saline, gauze, appropriate bandaging materials and Yunnan Baiyao.
Our Yunnan Baiyao Capsules can be kept as part of your dog's first-aid or supportive-care supplies where its use has been discussed with your veterinarian.
A final note
A bleeding lump can look frightening, but the priority is simple: control the immediate bleeding, keep your dog calm, and determine whether veterinary attention is required.
For dogs with known bleeding tumours, Yunnan Baiyao is one option used in integrative veterinary medicine to provide additional haemostatic support — orally and, in some cases, directly on superficial bleeding lesions.
It is supportive care, not a substitute for diagnosis or treatment of the underlying condition.
References & further reading
Frederick J, Boysen S, Wagg C, Chalhoub S. The effects of oral administration of Yunnan Baiyao on blood coagulation in beagle dogs as measured by kaolin-activated thromboelastography and buccal mucosal bleeding times. Canadian Journal of Veterinary Research. 2017;81(1):41–45.
Tansey C, Wiebe ML, Hybki GC, Patlogar JE, Murphy LA, Bianco D, Nakamura RK. A prospective evaluation of oral Yunnan Baiyao therapy on thromboelastographic parameters in apparently healthy dogs. Journal of Veterinary Emergency and Critical Care. 2018;28(3):221–225.
Wirth KA, Kow K, Salute ME, Bacon NJ, Milner RJ. In vitro effects of Yunnan Baiyao on canine hemangiosarcoma cell lines. Veterinary and Comparative Oncology. 2016;14(3):281–294.
Important: This information is provided for general educational purposes and is not intended to diagnose or treat disease or replace veterinary advice. Any new, changing or bleeding lump should be assessed by a veterinarian. Seek emergency veterinary care for uncontrolled bleeding, weakness, pale gums, collapse, breathing difficulty or suspected internal bleeding.
